Gujarat PGCET Question Bank EC

7/22/2019 Gujarat PGCET Question Bank EC

1/262

1 AM 100

=0.7A 149 B 170

C 124.5 D 135

2 AM

=0.5 BC

A 83.30% B 94.40%

C 96% D 88.88%

3 I 4:3

A I B F

C A R D N

4 1 32 ,

A 32 B 8

C 5 D 4

5 I (IF) FM

A 455 KH B 10.7 MH

C 70 MH D 118.7 MH

6 A FM

A I B I

C I D I

7 FM AM R

A RF B M

C A D AGC

8 D FM

A P B N

C D A

9 AM 600 KH Q=100, IF 455

KH. I B


2/262

A 20B B 30B

C 35.5B D 46.5B

10 C

A B

C A D FE

11 B B QPK

A B

C D

12 8PK ?

A 900 B 450

C 22.50 D 150

13 N QAM

A 2 B 4

C 8 D 16

14 M ()

A L B H

C L D F

15 D

A RF B IF

C D

16 CD .

A 8000 / B 16000 /

C 20000 / D 44100 /

17 O .

A L B M

C L NR D D

18

A PAM B PM


3/262

C PPM D N

19 N

10 KH 128

A 1280 K B 140 K

C 70 K D 64

20 C

A B R

CA NR

D A

21 GM900

A 890915 MH B 935960 MH

C 890960 MH D 890910 MH

22 D GM1800

A 45 MH B 95 MH

C 25 MH D 50 MH

23 F GM .

A M B B

C M D B

24 I PN 30105 1000, P

D ..

A 3000 B 6000

C 30000 D 60000

25 F K B

A 2 GH 4 GH B 4 GH 8 GH

C 8 GH 12 GH D 12 GH 18 GH

26

1.5 1 E10.

A 1 GH B 5 GH

C 10 GH D 15 GH

27 D GM


4/262

A 104 B 64

C 13 D 2.2

28 CELP .

A B P

C C D H

29 I NR PCM 9 8

A 1 B B 3 B

C 6 B D 12 B

30 I

A B

C G D A

31

A B

C D

32

AE

B

A

CA

D

33 A P' . I

5. ..

A 0 B 0.5

C 1 D 534

A B C

C B D B'

35 A 50. I

50. N ..

A 1 B 2


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C 0 D N

36 C NR B . NR 60 B

A 57 B B 180 B

C 51.23 B D 55.23 B

37 P RF AM 12 4.

M

A 0.25 B 0.33

C 0.5 D 0.66

38R RF 1 MH, 10 KH. Q

.

A 0.1 B 10

C 50 D 100

39 B

A AM B DBC

C PM D PM

40 M AM 10 KH 20

KH, M ..

A B

C D 10

41 P

A

B

C

.D

.42 O E

A HF B

CB I

D I

43 G 1=1.5

2=1. M . (=3108/)

A 2.5 / B 2.5 /


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C 5 / D 5 /

44 I CDMA

AE

B

E

CE

D N

45 F

A B M

C M D

46 E PIN P

()

A E B

C G D I

47 N (NA)

A NA= B NA=

C NA=1 D NA=(12)

1/2

48 B 10

=0.5

A 0.625 B 1.25

C 2.5 D 5

49 B 10

=0.5

A 0.625 B 1.25

C 2.5 D 5

50 C

A B D

C A & B D N

51 I GM 1: N=7 2: N=19

A C 1 IR B C 2 IR

C C 1 C 2 IR D N N IR

52 I GM 1: N=7 2: N=19


7/262

AC 1

B

C 2

C C 1 C 2 C

D N N

53 I AM 0.5 0.75

A B 1.5 B B 1.5

C B D N

54 I FM , 5 10 .

A B

C 1.41 D R

55 I GM 5 MH ,

A 1/5,

A 15 B 25

C 40 D 200

56

A B

C D

57 ?

A AMP B GM

C IM2000 D NAM

58 B GM ..

A R B R

C I DR

59 F

A Q=R/D B Q=RD

C Q=D/R2 D Q=D/R

60 A 12 10 . E

3 . F

A 40 B 120

C 360 D 30

61 M ..


8/262

A D & B F

C I D

62 O 2.5G

A GPR B EDGE

C CDMA2000 1R D I95

63 2G ?

A AC B GM

C GPR D IDN

64 P

A LED B P

C LAER D FE

65 O 1=1.4

2=1.05. I

A 0.926 B 0.8

C 0.35 D 0.15

66 N 28 1300 .

. ?

A 50 B 100

C 200 D 400

67 AFER+

?

A B B B

C B D MA

68 I M E I

(IMEI)?

A M C C B M N C

C E N D N

69 N ( N) .

A

B

C

D

70 D N ( N) .

A C B O


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C H D L

71 F , () :

()=1/2 1 1 ()=0 . M .

A 1/2 2/3 B 1 2/3

C 1 4/3 D 2 4/3

72 P G

A R B P

C G D R

73 .

A A B A

C A DA

74 A

A I B D

C P D E

75 I PCM ,

A B N

CF

D N

76 I PCM ,

A P B N

C F D H

77 F

A 20 H 20 KH B 500 H 10 KH

C 300 H 3.4 KH D 300 H 5 KH

78 R H F (HF)

A 330 MH B 30300 MH

C 3003000 MH D 330 GH

79 P

A M B M


10/262

C D D

80 ?

A PPM B PM

C PAM D A

81 Q

A PM B PPM

C PCM D AM

82 ?

A PAM B PM

C PCM D AM

83 ?

A PM B PCM

C DM D ADM

84 I ,

A B

C D N

85 F , 32

A 4 B 5

C 8 D 32

86 I QAM

A A B F

C A P D B

87 I PCM , .

AH

B

C R D P

88 A 20 B 15 B

9 B.

B


11/262

A 21.53 B 11.07

C 10.44 D 0.63

89 A 200 MH Q 10

10 F. 170C.

?

A 1 B 2

C 8 D 16

90 N B 3B

?

A BN > B3B B BN = B3B

C BN =0.5* B3B D BN = 0.5**B3B

91 N B 3B L

?

A BN > B3B B BN = B3B

C BN =0.5* B3B D BN = 0.5**B3B

92 (P)

500 MH 2.5 B?

A 0.5 B 0.557

C 1 D 1.557

93N 10. I

0.24105. C ..

A 2.6105 B 0.025

C 26105 D 6108

94 I ,

A B I

C I D D

95 10.

B 1 MH. A 270 C

A 0.40 B 1.28

C 0.16 D 1.19


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96

(5+10)

A E B

C R D N

97 P FM .

A H B

C P D H

98 I ..

A RF B M

C IF D D

99 M AM 0 1,

A I 100% B I 50%

C I 25% D D

100

?

A B B BC

C DBC D AM

101 F FDM ,

A AM B FM

C B D DBC

102 1 MH

100 .

?

A 990 KH B 1010 KH

C 1020 KH D 1030 KH

103 1 MH 100

.

?

A 990 KH B 1000 KH

C 1010 KH D 1020 KH


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104 I , 600

400 . M

A 0.25 B 0.5

C 0.75 D 1

105 C

0.2, 0.4 0.5 ?

A 1.1 B 0.67

C 0.55 D 0.25

106 AM 6 A. I 5 A

. ?

A 0.94 B 0.83

C 0.69 D 0.33

107 AM 1 K. I , 200 .

?

A 0.201 B 0.404

C 0.8 D 0.894

108 I ,

..

A N B L

C C C D H

109 FM 10 ,

A 3.33 B 10

C 30 D 10

110 B FM

A M B C

CM

D P

111 F IF

AP

B P

C D P


14/262

112 F AM

A B P

C D PIN

113 IF FM ..

A 10.7 MH B 50 KH

C 100 KH D 200 KH

114 B

A BP

C RFC D P RC

115 F FM

A D B P

C R D PLL D

116 HF 900MH

.

AB 900 MH,

B

G P

900 MH.

C

L

D N

117 GM

A CDMA FDMA B FDMA DMA

C O FDMA D O DMA

118 LAN

A

L

B

CL

D

119 A IEEE 802.11 LAN 50

.

A 64 B 2 MBP

C 11 MBP D 54 MBP

120 GPR .


15/262

AC

B

P

C D M

121 M

A384 2.048

M B

64 K 1 M

C2.1 MBP 8 MBP

D N

122 IEEE 802.16 MA .

A 2 MBP B 8 MBP

C 54 MBP D 75 MBP

123 B .

A B

C D

124 IEEE 802.15.1 B

A 512 B 800

C 1600 D 3200

125IEEE 802.11 LAN 2 MBP

D .

A BPK B QPK

C DQPK D QAM

126 10 LAN

2M .

A 2 MB B 2.5 MB

C 10 MB D 20 MB

127 IEEE 802.15.1 PAN

A D B OFDM

C FHCDMA D FHDMA

128 I ,

.


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A 1 B 10

C 100 D 500

129 CDMA .

A 16 B 32

C 64 D 512

130 D CDMA

A BPK B QPK

C DQPK D QAM

131CDMA .

A 2 M B 8 M

C 3.84 M D 16 M

132 CDMA

A LPC B RELP

C A CELP D DPCM

133 M EIRP III CDMA

A +23 B B +13 B

C +9 B D +3 B

134 A ,

A B

C D

135 M E/N ..

A P B B

C D A

136 CDMA I95

A FDMA B FH

C D D H

137 I D , 48 M 4.8 K,

P B


17/262

A 4.8 B B 48 B

C 40 B D 60 B

138 I FH 500 MH,

5 KH. B?

A 5 B B 50 B

C 4 B D 40 B

139 E CDMA I95

A 200 KH B 600 KH

C 1.25 MH D 10 MH

140 O CDMA,

1 B

.

A 1 B 1.25

C 10 D 1.25

141 MAHO

A B

C D

142

?

A FK B QPK

C GMK D QAM

143 GM

.

A 1.25 B 120

C 4.615 D 125

144 M GM .

A 200 B 270.833

C 64 D 2 M

145 GM .

A 1 /H B 1.35 /H


18/262

C 2 /H D 4 /H

146 G

A M IP BM

CM

D M

147 B C C (BCCH) B .

A F B C

C C D A

148 RF GM ..

A 3 B 4

C 8 D 16

149 B BC

A I B A

C A D D

150 2

8

A 3 B B 6 B

C 12 B D 15 B

151

AQ

B

N

C O D R

152

I

A 2 B 3

C 4 D 5

153 C 7

4. I

A 28 B 7

C 4 D 1.7


19/262

154 C

A B

C C D C

155 ,

2

A 3 B 23

C 43 D 4

156 M 2 2. C

N=7. ?

A 3.5 2 B 7 2

C 14 2 D 143 2

157 10 7 . 16

. ..

A 1120 B 112

C 70 D N

158M 1000

. I 20

4. .

A 1000 B 5000

C 10000 D 20000

159 I ,

=2 =2 .

A 4 B 8

C 12 D 16

160 P

.

A , B ,

C , D ,

161 I ,

A R 6 B B R 3 B


20/262

C R 12 B D N

162 I , 10.

3 B. EIRP .

A 10 B 20

C 30 D 3.33

163 PLL

A AM B FM

C PM D PCM

164 10 KH 11 KH

. O .

A 21 KH B 1 KH

C 210 KH D 1.1 KH

165 I FM , ..

A 3.4 KH B 5 KH

C 15 KH D 20 KH

166M FM 10 KH 20 KH,

A G B D

C I 20 KH D I 10 KH

167 I FM , /N

A B

C

D

P

168I 20 KH 50 KH.B FM C' .

A 40 KH B 90 KH

C 140 KH D 200 KH

169 F FM AM

A N B F

C C D


21/262

170 A 1.536 128

. Q

A 0.12 2

B 0.012 2

C 0.0012 2 D 0.000012 2

171 PCM 30 ..

A 64 KBP B 2.048 MBP

C 4 MBP D 8 MBP

172 QR PCM 10

A 48 B B 56.8 B

C 64 B D 67.78 B

173 P

A DM B A DM

C A DM D N

174 PCM ,

A B

C D NR

175 F

A B DC

C F PD D

176 DC

?

A M B NR

C R D N

177 ?

A AK B BFK

C BPK D DPK

178 O NR ,

A N

PD

A 2A/N B 2A2/N


22/262

C A D A/N

179 M DPK

A AND B OR

C ENOR D NAND

180I FK, 0

10 KH 1 25 KH.

.

A 45 B 50

C 200 D 250

181 F 8 ,

FK

A 32 KH 40 KH B 8 KH 12 KH

C 20 KH 40 KH D 16 KH 20 KH

182 AK, FK PK

A A B D

C A D D A

183 C

A A B M

C M D A

184 B QPK 100

A 800 B 400

C 200 D 100

185 I ,

.

A M B D

C D I

186

..

A R B


23/262

CM

D B

187

A


24/262

C 1000 D N

195 R . C

.

A H B D

C D F

196 I , ..

A 3 B B 6 B

C 9 B D 8 B

197M 4 16 . B

A 4 B 5

C 6 D 8

198 O M

A 5 10 B 2 5

C 1 2 D 1

199 M C/I

.

A 3 B B 6 B

C 9 B D 12 B

200 I 20 3

E .

A 6.66 B 30

C 60 D 360

201O .

A E B L

C C D A

202 B 1' 0'

0.01. C ...

A 0.9 B 0.909

C 0.99 D 0.92


25/262

203 F ,

NR 30 B

A 64 KBP B 32 KBP

C 33.89 KBP D 16 KBP

204 I ,

.

A 8 B 4

C 1 D 0

205 PCM ?

A 8 B 4

C 1 D 0

206 A 1,2,3 4 0.5,

0.25,0.125 0.125 . A

1 2

A 1 1 2 B 2 1 2

C 1 1 2 2 D 2 1 1 2

207 ,

0.25

A 0.25 B 5

C 1 D 2

208 E 4 0.5,

0.25, 0.125 0.125

A 1 / B 1.75 /

C 2 / D 4 /

209 C 4 KH 15 B

NR A 4 B 8.02

C 20.11 D 32.40

210 I 1 ,

A 1 B 64

C 125 D 625

211 M (0,)


26/262

A B ()

C () D /2(2)

212 I I

A

B

B

.

CB

D A

213

A R II B R

C R D N

214 E/N

. E=R N/2

.

A 0 B B 3 B

C 1.59 B D 1.33 B

215 RC 1000 F

10 ,

10 KH .

A 0.25 B 0.5

C 0.85 D 0.9

216 HD

A 4:3 B 16:9

C 9:16 D 3:4

217 A HD

A I 1080 B P 780

C B A B D N

218 I 1080 HD , ..

A 786 B 1280

C 1920 D 2400

219

A 1 MH B 40 GH


27/262

C 100KH D 10 GH

220 F PPM PM

A A B DF

C M D

221 N

20H15KH 8

1 ?

A 1.2 MB B 1.8 MB

C 30 KB D 64 KB

222 D LPC10 ..

A 2.4 B 4

C 8 D 16

223 12

DPCM . ..

A 128 B 192

C 256 D 384

224 F

A L B H

C D A

225 HDMI C LCD/LED

A D C B C

C C D A

226 E ..

A R B B

C D A

227 G GMK

A

B

.

C II

D A


28/262

228 F LPC10

A P B G

C D /

229H 40 ?

A 160 B 200

C 320 D 400

230F PPM

A L B B

C A D M

231 I PCM ..

A NR BL

CM

D A

232I PCM ..

A

B

C N D A

233 F R232

A R B

C C D DR

234 M PCM

16 4 .

A 0.0833 B 0.05

C 0.5 D 4

235 A

A R BR

C D D A


29/262

236 D

A

P

B

I

C D A

237 F ..

AB

B

NR

C

B

D N

238 R C B

A NR = 7.78 + 20C B C=2B10(1+NR)

C C=2B2(NR) D C=B2(1+NR)

239 N

A B

C D P

240 10 DM

.

A 12.5 B 125

C 1250 D N

241N CCIRB

I

A 625 , 52 B 525 , 53

C 625 , 64 D 525 ,12

242 O DMA GM

A 156.25 B 114

C 57 D 26

243 O DMA GM

A 156.25 B 114

C 57 D 26


30/262

244 F MC

A HLR B LR

C EIR D AC

245 E ..

A B C

C B D E

246 F

A PRMA B DMA

C FDMA D CDMA

247 A

A O B P

C D D

248 II DMA

A B C

C I D C E

249 I M , R=1/ R=1/

:

A =2M B =M

C =210M D R=R2M

250

A B

C 1

0D A


31/262

1

x x E is

A . E - 2E B 2E - . E

C 2E + E D . E - E.

2Unit vector of E is

A E / E B E ( ax+ ay + az )

C E . E D E / E

3E x H is

A EH cos B EH sin C EH sin an D EH cos an

4E x ( A + C ) is

A E x C + E x A B E . A + E x C

C A.E + C.E D A x E E x C

5Gradient of a scalar is

A Not defined B A vector

C a scalar D Not periodic

6 Divergence of a vector is

A Not defined B a scalar

C A vector D The same as gradient of a vector

7 The unit of del is

A Does not exist B meter

C 1/meter D dB

82 operates

A Only on scalar B Only on vector

C On a scalar and also on a vector D Only on a constant

9 ax . ax is

A axB 1

C 0 D ay


32/262

10ax . ay is

A

0

B 1

C az D -az

11 ax X ay is

A 1 B 0

C az D -az

12ax X ax is

A 0 B 1

C az D ay13

For static fields

A x H= D B x H= J

C x H= 0 D x H= E

14 In free space

A x E= 0 B x E= v

C .D= v D

x E= -B/tttt

15 Unit of Eis

A Volt B Amp/m

C Volt/m D Volt/coulomb

16Unit of His

A Weber B ampere

C Volt/m D Amp/m

17 Unit of Dis

A Wb/m B Amp/m

C C/m2 D C/m

18D is

A E B H

C H D E/tttt


33/262

19 .DDDD/tttt is

A

sB v

C l D 0

20 x E is

A BBBB/tttt B ----BBBB/tttt

C DDDD/t + Jt + Jt + Jt + J D JJJJ

21 The electric flux density , D is

A E B E

C E /0 D E22

The electric flux is

A Q B D

C E D Q

23 The unit of electric flux is

A Weber B Gauss

C Tesla D Coulomb

24 In free space

A

. E= 0 B x E= 0

C .E= v D .E= v/ 0

25 In free space

A . B= 0 B . B= 0H

C x B= 0H D . B= H/ 0

26 For free space

A = 0 B J = 1 Amp/m2

C r = 0 D r= 0

27The unit of conduction current density is

A Amp/m B Amp/m2

C Amp/m3 D Amp


34/262

28 The unit of displacement current density is

A Amp/m2 B

Amp/mC Amp D Amp-m

29 The unit of conduction current is

A Amp B Amp/m

C Amp/m2 D Amp-m

30 The unit of permittivity is

A Farad B Henry

C Farad/m D Henry/m

31The unit of permeability is

A Henry/m B Farad/m

C Henry D Weber

32 The conduction current density is

A E B D

C E/ D D

33 The displacement current density is

A EEEE/tttt B D

C D D 0E

34 For uniform plane wave propagation in z-direction

A Ez= 0B Ezf(y)

C Ezf(x) D Ez= 0 , Hz= 035

The line integral of E around a closed loop is

A Zero B Q

C Equal to current D v


35/262

36 The unit of attenuation is

A

dB/m

B V/m

C Amp/m D Coloumb/m

37Velocity of a plane wave whose r= 4 , r = 1 is

A 3 x 108 m/s B 1.5 x 10

8 cm/s

C 6 x 108 cm/s D 2 x 10

8 cm/s

38 Velocity of uniform plane wave in free space is

A 3 x 108 m/s B 3 x 10

8 cm/s

C 3 x 106 cm/s D 3 x 1010 cm/s39

The unit of depth of penetration is

A dB B Meter

C Neper D radian

40E.H for a plane wave is

A Zero B 1

C Does not exist D EH

41 Equation of continuity is

A .J= -v/tttt B .J= -v

C .J= v/tttt D .J= s/tttt

42Magnetic current density is given by

A B B DDDD/tttt

C BBBB/tttt D ----BBBB/tttt

43 The unit of magnetic current density is

A Amp/m2 B Volt/m

2

C Amp D Amp/m

44Boundary conditions on Eis

A anX (E1 E2) = 0B Et1= Et2

C an . (E1 E2) = 0D an . E1= 0


36/262

45 Boundary conditions on His

A Ht1= Ht2 B Ht1- Ht2 = Js

C anX (H1 H2) = JsD anX (H1 H2) = 0

46 Boundary conditions on Bis

A anX (B1 B2) = 0B an.(B1 B2) = 0

C an.(H1 H2) = JsD Bn1= Bn2

47 Boundary conditions on Dis

A an.(D1 D2) = 0B an.(D1 D2) = s

C an X (D1 D2) = s D an X (D1 D2) = 048

Boundary conditions on Jis

A an X (J1 J2) = 0B an .(J1 J2) = 0

C an X (J1 J2) =JsD an.(J1 J2) =Js

49 Lorentz Gauge condition is

A .A= - VVVV /tttt B x A = H

C x A = B D

.A= - VVVV/tttt

50 Equation of continuity is

A J.dS= I B J.dS= Q

C J.dS= J D J.dS= v51

Intrinsic impedance of a medium is given by

A Sqrt(/ ) B Sqrt( j/ (+j)

C Sqrt(/) D Sqrt()

52 The characteristic impedance of free space is

A 277 B 120

C 377 D 1202

53The wave equation in free space is

A 2E = 0 0EEEE /ttttB 2E = 0 02222EEEE /tttt

C 2V = - v/ D 2E = 2222EEEE /tttt


37/262

54E and H are always perpendicular to each other

A

Yes

B Some times

C Only for uniform plane wave D None of these

55 Velocity of propagation of a plane wave is

A / B /

C / f D f /

56 Attenuation of plane wave in free space is

A Zero B infinite

C Propagation constant D itself57

A medium is a good conductor if

A (/ ) >> 1 B (/ ) > 1 B (/ )


38/262

CInversely proportional to squareroot of conductivity

DNot a function of conductivity

63

Phase velocityof uniform plane wave is

A Directly proportional to B Inversely proportional to

CNot a function of

DNot Inversely proportional to

square root of 64

Phase constant of a uniform plane wave in a medium is

A Directly proportional to frequency B Not a function of frequency

CIs inversely proportional to

frequencyD

Is inversely proportional to

square root of frequency65 The characteristic impedance of a medium is

A Sqrt(/ ) B Is a function of frequency

C Not a function of frequency D Is independent of , and f

66Poynting vector gives

A Instantaneous power density B Average power density

C Total power D Total power density

67 Standing waves are produced when

A There are no reflections B There are full reflections

C There is only transmission DThe waves are incident on good

dielectrics

68 The minimum value of voltage standing wave ratio is

A 0 B -1

C 1 D -

69When the load impedance ZL= Z0 , the VSWR is

A 10 B 1

C 0 D

70 Brewster angle is

AAngle of incidence for whichthere is no reflection

BAngle of refraction for whichthere is no reflection

C Equal to reflected angle D Equal to refraction angle


39/262

71 The range of HF is

A

3-30 kHz

B 30-300 kHz

C 3-30 MHz D 30-300 MHz

72 The range of VHF is

A 3-30 MHz B 30-300 MHz

C 300 MHz-3 GHz D 300 kHz 300 MHz

73 The standard antenna for reference is

A Isotropic antenna B Half-wave dipole

C Dish antenna D Yagi Uda antenna

74The most common popular prevalent TV antenna is

A Dipole B Monopole

C dish D horn

75 Among the following the Broadband antenna is

A Log-periodic B dipole

C Yagi-Uda D Horn

76 Among the following the non-resonant antenna is

A dipole B Yagi-Uda

C Monopole D rhombic

77 The common microwave link antenna is

A dipole B Log-periodic

C Rhombic D Parabolic dish

78Antenna for direction finding is

A Yagi-Uda B Rhombic

C Parabolic dish D Loop

79 The directivity of half-wave dipole is


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A 10 B 1

C 1.5 D 1.64

80The directivity of current element is

A 1.64 B 1.5

C 2.0 D 5.0

81 Reflectors in Yagi-Uda antenna are

A 1 B More than 1

C 3 D 10

82 Directors in Yagi-Uda antenna are

A More than 1 B 1

C 5 D 3

83 Radar antenna is

A Parabolic dish B dipole

C Horn D waveguide

84 The length of the folded dipole in yagi uda antenna is

A 468/f (MHz) feet B 492/ f (MHz) feet

C 342/f (MHz) feet D 192/f (MHz) feet85

The impedance of folded dipole in yagi-uda antenna is

A Inductive reactance B Capacitive reactance

C Purely resistive D 73

86 The radiation resistance of a current element is

A 80 2( dl / )2 B 80 ( dl / )2

C 80 2( dl / ) D 80 ( dl / ) 87

Circularly polarized antenna is

A Dipole B Parabolic dish

C Yagi-uda D helical

88 If the current element is y-directed , the resultant vector magnetic potential is


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A y-directed B x-directed

C

z-directed

D

-directed89For time-varying fields

A E= - V B EEEE = -V - AAAA /tttt

C EEEE = -V - DDDD /tttt D EEEE = -V - HHHH /tttt100 poynting vector gives

ADirection of electric field

BPolarization of electromagnetic

wave

C Power flow D Rate of energy flow

101 The length of folded dipole in yagi-uda antenna is

A Frequency dependent B Frequency independent

C Equal to D Equal to 0.2

102The spacing between folded dipole and reflector is

A B /2

C > /2 D < /2

103 Voltage standing wave ratio is

A Vmin/ VmaxB Vmax/ Vmin

C Vreflected / Vincident D Vmax

104Antenna is a

A transducer B filter

C Regulator D amplifier

105 The radiation resistance of a half wave dipole close to earth is

A 73 B < 73

C > 73 D Infinity

106If the directivity is high , the beam width is

A High B low

C constant D Very high


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107 Director in yagi-uda antenna is

A

Active element

B Driven element

C Parasitic element D Identical to dipole

108 Reflector in yagi-uda antenna is

A Active element B Driven element

C Identical to dipole D Parasitic element

109 Log-periodic antenna is

A Narrow band B Wide band

C Frequency independent D Frequency dependent

110In vertical dipole , the electric field is

A Parallel to the dipole B Perpendicular to dipole

C - directed D circular

111 The effective length of a vertical radiator is

AIncreased by capacitive hat

BIncreased by loading with lumped

Inductance

C Increased by supplying more power D Increased by resistance loading

112The null-to-null beam width in end-fire array is

A 2 / N d B Sqrt(2 / N d )

C 2 sqrt(/ N d ) D 2 sqrt(2 / N d )

113

The null-to-null beam width in broad side array is

A 2 / N d B 2 sqrt(2 / N d )

C 2 2/ N d D Sqrt(N d / 2 )114

The length of resonant dipole is

A /2 B

C /4 D 2 115

The first side lobe level in uniform array is


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A 0.212 B 0.121

C 0.312 D 0.51

116The side lobe level in binomial array is

A Zero B -13.5 dB

C -20 dB D Zero dB

117 In binomial array the central elements are excited

A strongly B Weakly

C Uniformly D easily

118 In horizontal polarized waves the electric field is

A Parallel to the ground B Perpendicular to the ground

C In -direction D Elliptical

119 The maximum directive gain of current element is

A 1.76 dB B 2.15 dB

C 3 dB D 0 dB

120 Band width of an antenna is

A f0/ QB Q / f0

C f0Q D f02/ Q

121 Antenna can be used as

A Sound sensor B Light sensor

C Temperature sensor D Colour sensor

122For far field of z-directed current element

A H= - sin AAAAzzzz/rrrr B H= 0

C H= H D H= Hr

123 Induction and far fields have equal magnitudes at


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A r = / 2 B r = / 6

C

r = / D r =

124Induction and radiation fields have equal magnitudes at

A r = v0/ B r = v0/ 2

C r = v0/ D r = v0/

125 If the output signal power level is 1 W , power gain is

A 0 dB B 1 dB

C 10 dB D dB

126 LF antennas are usually used for

A Vertical polarization B horizontal polarization

C Circular polarization D Elliptical polarization127 The real part of antenna impedance consists of

A Rr onlyB Rrand Rl

C Rl onlyD Zero ohms of resistance

128 Power and field patterns are related as

A P E2 B P E

C P E D P E129

For radiation pattern measurement the distance of the far field region is

A r > 2 D2/ B r < D2/

C r=/ D r=D/

130 GTEM cell means

AGeometric transverse

electromagnetic cellB Giga Hertz TEM cell

C Grounded TEM cell D Geo TEM cell

131 Whetastone bridge is used to measure antenna impedance at a frequency of

A Giga hertz B Upto microwave frequency range

C Upto millimeter range D Upto 30 MHz


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132If the field measurements are made at r < 2 D

2/

A

Side lobe levels will be high

B Bandwidth will be small

CBand width and side lobe levels are

smallD No side lobes appear

133Null-to Null bandwith is

A Equal to 3 dB bandwith B Greater than 3 dB band width

C less than 3 dB band width D Not related to 3 dB band width

134Antenna efficiency is

A gp/ gdB gd/ gp

C gp D gd135

Phase difference is

A B /

C Path difference x D / 136 If the response of a vertical dipole is 1 for a unity normalized input power , the

polarization is

A Vertical B Horizontal

C Circular D elliptical

137 If the response of RCP helix is zero , the polarization of test antenna is

A LCP B RCP

C Horizontal D Vertical

138If the response of RCP helix is maximum , the polarization of test antenna is

A LCP B RCP


139If the response of LCP helix is maximum , the polarization of test antenna is

A LCP B RCP


140If the response of a horizontal dipole is maximum , the polarization of test antenna is

A Horizontal B Vertical

C Circular D elliptical


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141 If the response of any type of antenna is 0.5 for unity normalized power, the

polarization of test antenna is

ALinear

B Horizontal

C Vertical D unpolarised

142The excitation levels of a three element binomial array are

A 1,2,1 B 1,3,1

C 1,4,1 D 2,3,2143

The excitation levels of a four element binomial array are

A 1,3,1,1 B 1,2,2,1

C 1,3,3,1 D 1,4,4,1144

The basic transmission loss between transmitter and receiver is

A 10 log ( ( 4 d )/ )2 B 10 log ( / ( 4 d ))2

C 10 log ( GTXGRX ) D zero

145Actual transmission loss between transmitter and receiver is

A 10 log { ( /( 4 d ))2 * 1/ ( GT

GR) }B 10 log { ( ( 4 d )/ )

2 * 1/ ( GT

GR) }

C10 log { ( ( 4 d )/ ) * GTGR}

D 10 log { ( /( 4 d ))* ( GT

GR) }146 Friss formula is

A La= ( / ( 4 d ))2 B La= ( ( 4 d )/ )2

C La= 10log10( ( 4 d )/ )2 * 1/ (

GTGR)D La= 10log10( ( 4 d )/ )2

147 Noise figure of antenna is

A Te/ T0B 1 + (Te/ T0 )

C 1 - (Te/ T0 ) D 1 + (Te/ T0 )2

148 Actual transmission loss in dB between transmitter and receiver is

AGreater than basic transmission

lossB

less than basic transmission loss

C Equal to basic transmission loss D infinite


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149 Schelkunoff polynomial method gives

A

Nulls in the desired direction

B Nulls in undesired directions

C Desired side lobes D Desired beam width

150 Range of VSWR is

A 0 to 1 B 1 to

C 0 to D - to 151 Tchebyscheff polynomial method gives

A Desired side lobe ratio B Desired beam width

C Desired overall pattern D Desired phase function

152The advantage of uniform linear array is

AThe required number of sources

is oneB SLR is small

C Number of side lobes are less D Grating lobes are present

153 The current distribution in half-wave dipole is

A Sinusoidal B constant

C Triangular D parabolic

154When the array length high, the null to-null beam width is

A Small B High

C Constant D infinity

155Conducting properties of earth are

A Constant with frequency B Change with frequency

C Change with the type of antenna D Change with excitation of antenna

156 In conductor , if charge is not moving , the radiation is

A Very high B Zero

C The same as when charge moves D moderate


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157 If a charge is moving with a uniform velocity in an infinite straight wire , the

radiaton is

AInfinite

B Moderate

C Zero D high

158If the charge is moving in a curved wire , radiation

A Exists B Does not exist

C Is infinite D Same as when the wire is straight

159If the charge oscillates with time in a straight wire , it

A Radiates B Does not radiate

C Stores energy D oscillates

160If the charge accelerates , there exists

A No radiation B Radiation

C Stored energy D Acceleration of antenna

161If the charge deccelerates , radiation

A Is zero B Exists

C Does not exist in any antenna D Exists only in some wire antenna

162 The primary equation for electromagnetic radiation in a very thin z-directed wire of

length L

A L dIz/ dt = L LazB L dIz/ dt = L Lay

C L dIz/ dt = LayD L dIz/ dt = L L

163Radiation with broad frequency spectrum is very strong if

A pulses are of shorter duration B pulses are of longer duration

C Pulses have more amplitude D Pulses have small amplitude

164For frequency independent antennas , the band width is

A zero B

C Finite D Moderate


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165 The radiation intensity of an isotropic radiator is

A

Pr/ 4 r2

B

Pr/ 4 rC Pr/ 4 D Pr

166 An omni directional antenna from the following

A Parabolic dish B Dipole

C Horn D Yagi-uda antenna

167 Loop antenna is a

A Isotropic radiator B Directional radiator

C Omni-directional radiator D Point source

168Broad side arrays are

A Omni-directional B Point sources

C Directional antennas D Isotropic antennas169 In linear polarization , there exists

A Three components B Only one component

CTwo components differing by 90

0phase

DTwo components differing by 270

0phase

170 If there exists two orthogonal linear components which are in time phase,

polarization is

A Linear B Circular

C Elliptical D Not present

171 Effective area of an antenna is

ARatio of power delivered to load

to power density of incident waveB

Ratio of radiation intensity to

power density of incident wave

C gp/ gd D gd/ gp

172 Aperture efficiency , aof an antenna is

AThe ratio of gp and gd

BMaximum effective area to physical

area

C Effective area to physical area D Physical area to effective area


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173 In far-field region , the angular field distribution is independent of

A

Transmitter power

B Distance from the antenna

C Angular region D Antenna type

174 Fresnel region is

A Far-field region B Near-field region

C The region of constant field D The region of no field

175 Fraunhofer region is

A Far-field region B Near-field region

C The region of constant field D The region of no field

176Reactive near-field region exists when

A R > 0.62 * sqrt( D3/) B R < 0.62 * sqrt( D2/)

C R < 0.62 * sqrt( D3/) D R > 0.62 * sqrt( D2/)177 Fresnel region exists when

AR 0.62 * sqrt( D3/)

BR 0.62 * sqrt( D /) and R 2D2/ B R < 2D2/

C R 0.62 * sqrt( D3/) D R 0.62 * sqrt( D3/)

179Unit of directivity is

A Watts B Watts/m2

C Watts/m3 D nil

180 Unit of solid angle

A Degrees B Radian

C Sterradian D nil


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181 If h is the height of an antenna , the number of side lobes are

A

h/ B 2 h/

C 4 D 2 / h

182 Divergence factor of a field from earth is

A

Reflected field from flat earth /

reflected field from curved

surface

B

Reflected field from curved

surface / reflected field from flat

surface

C

Reflected field from curved earth

/ incident field from curved

surface

D

incident field from curved earth

/ reflected field from curved

surface183 If Rris radiation resistance , eis effective permeability of ferrite core , the

radiation resistance of ferrite loop is

A Rr (0/ e)2 B Rr (e/ 0)

2

C Rr D Rr 0

184 The resultant field of an array antenna is

AThe product of element pattern

and array factorB Array factor

C Sum of element patterns D Element pattern

185The excitation required to orient a beam in 0direction is

A kd cos 0B -kd cos 0

C -kd D kd

186 Super directivity of an array can be obtained by

A Reducing the spacing B Increasing the spacing

C Reducing the number of elements D Decreasing array length

187 Super directivity obtained by reducing the spacing and increasing the number of

elements results in

A High reactive power and Q B low reactive power and Q

C Small Q DHigh reactive power and lower

Q188

Circular antennas are most sensitive to

A Linearily polarized waves B Elliptically polarized waves


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C Circularly polarized waves D Unpolarised waves

189Circular antenna has usually a length of

A / 2 B

C 2 D / 4

190 The horizontal pattern of a circular antenna is

A Circle B Four equal lobe pattern

C Figure-eight pattern D Six equal lobe pattern

191Two end fire circular antenna elements with 90 phasing produce

A Unidirectional pattern B Figure eight pattern

C Multidirectional pattern D No radiation pattern

192Cirular antennas are widely used at

A VLF B HF

C Microwave frequency D UHF

193 Directors in yagi uda antenna

A

Reduces the characteristic

impedance of a driven antennaelement

B

increases the characteristic

impedance of a driven antennaelement

CHas no effect on the characteristic

impedance of driven elementD Act as open circuit

194Directors and reflectors are used to

A Reduce the impedance B increase the impedance

C Increase the gain D Form an array

195 Due to use of parasitic elements the bandwidth of yagi-uda antenna is

A Increased B Not affected

C Made ideal D Limited

196Yagi-uda antenna has

A Poor front to back ratio B good front to back ratio

C infinite front to back ratio D zero front to back ratio


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197 V-antenna yields

A

Bidirectional pattern

B Unidirectional pattern

CGood signal strength compared to

dipoleD Less band width compared to dipole

198V-antenna is popular for

A Satellite reception B FM reception

C Mobile reception D Radar signal reception

199If the power gain of an antenna is 0.5 dB , the power ratio is

A 0.216 B 12.6

C 1.26 D 1.06

200If the voltage gain of an antenna is 1.0 dB , the voltage ratio is

A 1.26 B 0.126

C 1.06 D 1.0

201If the power gain of an antenna is 30 dB , the power ratio is

A 1.477 B 1000

C 100 D 10

202If the power gain of an antenna is 20 , the power gain in dB is

A 13 B 130

C 20 D 200

203If a dipole is tilted forward , the band width becomes

A Zero B Infinite

C More D reduced

204 If a 300 line is terminated in 75 dipole , SWR is

A 4 B 0.25

C 8 D 2

205The power density at a distance of 1 km from 1 kW isotropic radiator is

A 795 mW / m2 B 79.5 mW / m

2

C 795 W / m2 D 79.5 W / m2


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206 For radio wave propagation , fresh water is considered to be

A

Very poor

B Poor

C Very good D average

207 For radio wave propagation , cities are considered to be

A Poor B Very poor

C Very good D good

208The phase velocity of a wave in medium whose r = 0 is

A B 0

C Finite D V0

209Antenna radiation efficiency is high when its length is

A / 2 B

C 3 / 2 D 210 Antenna resonates when its length is integer multiples of

A B / 2

C / 4 D / 3

211 For a 100 antenna with 2 A of current , radiated power is

A 400 watts B 200 watts

C 50 watts D 25 watts212

For a perfect conductor the power transmission coefficient is

A 1 B zero

C D Reflection coeeficient

213For a perfect conductor , the power transmission coefficient ||2 is

A Equal to transmission coefficient B 1 T

C 1 D 0

214 The Rayleigh criterion in the case of reflection of electromagnetic wave from semi-

rough surface is

A Cos i > / 8dB Cos i = / 8d

C Cos i < / 8dD Cos i = 0


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215 The percent bandwidth of an antenna with an optimum frequency of operation of 500

MHz and - 3 dB frequencies of 300 MHz and 350 MHz is

A20 %

B 100 %

C 500 % D 10 %

216 The received power of a receiving antenna whose effective area is 0.2 m2for an

available power density of 100 W / m2

A 200 B 20

C 50 D 500

217For an ideal antenna , the directivity is

A Power gain B 1

C 1.64 D 1.5

218 For an ideal antenna , the radiation resistance is

A 73 B 36.5

C 293 D Input impedance

219 The power gain in dB of isotropic radiator is

A 0 B 1

C 1.5 D 1.64

220The normalized power of a dipole is

A 1 B 1.5

C Sin2 D 1.64

221 If the resistance part of antenna is 100 , radiation resistance is 80 , the antennaefficiency is

A 0.8 B 10/8

C 0.4 D 8/18

222 If is the angle between the axis of a receiving dipole and the direction of electricfield , the polarization loss factor is

A Sin B cos

C tan D sec


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223 The effective length of a half wave dipole is

A

0.4 B

0.45 C / D 0.55

225 Effective area of a Hertzian dipole is

A 0.2 2 B 0.25 2

C 0.119 2 D 0.3 2226 Directive gain is equal to power gain if

A = B = 1

C = gp D = gd227

Directive gain and directivity are equal for

A Directional antenna B Dipole

C Parabolic dish D Isotropic antenna

228For an isotropic antenna operating at = sqrt(4 ) , the effective area is

A4 B 1

C(4 )2 D 2

229 Directivity is

Ainversely proportional to beam width

Binversely proportional to square of

beam width

C Directly proportional to beam width DDirectly proportional to square of

beam width

230 If the direction of propagation of an electromagnetic wave is in z-direction , the

polarization is in

A z-direction B y-direction

C x-direction D Circular polarization

231 If the quality factor of an antenna is 1000 , resonant frequency is 10 MHz its bandwidth is

A 100 kHz B 10 kHz

C 10 Hz D 10 MHz232 The maximum effective area of an antenna operating at = 10 cm with the

directivity of 100 is

A 1000 cm2 B (1/4 ) m

2

C 4 m2 D 10 m2


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233 The radiation resistance of an antenna which radiates 10 kW when a current of 10

ampere flows in it , is

A100

B1,000

C 10 D 100 k234 When an antenna radiates 10 kW in forward and 1 kW in backward directions , the

front-to-back ratio of an antenna is

A 1 dB B 10 dB

C 100 dB D 0 dB

235If a medium has r = 81 , = 2 mho/m , f = 10 GHz , it is

A A conductor B A bad conductor

C An insulator D A good insulator

236The radiated electric field is

A dl B (dl)2

C 1/ dl D 1/(dl)2237 Poynting vector has the unit of

A Watts / m3 B watts

C

Watts / m

2

D Volt-ampere

238 The current element has a directive gain of

A 3 / 2 B 2 / 3

C 1 D 1.64

239The polarization of horizontal dipole is

A Vertical B Horizontal

C - polarization D elliptical

240To receive horizontally polarized wave , the receiving antenna should be polarised

A Vertically B Horizontally

C Circularly D Elliptically

241The skin depth of an ideal conductor is

A B Zero

C Finite D Sqrt()


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242 The conducting properties of a medium depends on

A

OnlyB only

C f only D , and f

243 The surface current density of a good dielectric medium is

A Zero B Infinity

C Finite D - 1

244 The surface charge density of a good dielectric medium is

A -1 B Infinity

C Finite D Zero

245In the boundary condition Dn1- Dn2 = s, the unit of s is

A C / m3 B C / m2

C C / m D C246

In the boundary condition Ht1 Ht2= Js, the unit of Js

A Ampere B Amp/m

C Amp/m2 D H/m

247 In the boundary condition Bn1- Bn2 = 0 , the unit of Bn1 is

A Wb B Wb/m

C Tesla/m D Wb/m2

248In the boundary condition Et1 Et2= 0 , the unit of Et2 is

A Volt/m2 B Volt/m

C Volt D Volt-m

249H is

A x E B B /

C . BBBB D P / E

250The permittivity of a space is

A 1 B 0

C > 1 D


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251 The electric field of a circularly polarized wave is represented by

A

( ax+ j ay) e

j ( t - z )

B

( ax+ j ay) e

j ( t )

C ax e

j ( t - z ) D ayej ( t - z )

252 A qurter wave line yields

A Zero impedance B Infinite impedance

C Impedance inversion D Real and reactive impedance

253 The tangential electric field at a perfect conductor is

A 1 B

C Zero D - 254

An electromagnetic wave when incident on a perfect conductor is

A Reflected completely B Transmitted completely

C Reflected and transmitted D Refracted completely

255 The electric field of elliptically polarized electromagnetic wave is represented by

A ( ax+ j ay) ej ( t - z ) B ( Exax+ j Eyay) e

j ( t - z )

C Exax ej ( t - z ) D Eyay e

j ( t - z )

256 The transmission line can be converted into

A A dipole antenna B A dish antenna

C A horn D lens

257The length of the mobile antenna is a

A B /2

C /4 D >

258E.H of uniform plane wave is

A EH B 0

C E2 D None of these

259For static magnetic field

A X B= B X B= J

C . B= 0J D X B= 0


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260 Electric field in free space

A

D/ 0B D/ 0

C 0D D /0

261 For uniform plane wave in x-direction

A Ex= 0B Hx= 0

C Ex= 0 and Hx= 0D None of these

262 Displacement current density is

A D B J

C D/t D J/t263

Depth of penetration in free space is

A B 1/

C 0 D None of these

264 Complex pointing vector Pis

A P= - E x H* B P= E x H*

C P= E x H* D None of these

265 The time varying field is

A E= - V B E= - V -A/t

C E= - V -B D E= - V - D

266Uniform plane wave is

A Longitudinal in nature B Transverse in nature

C Neither transverse nor longitudinal D Vertically directed

267 The direction of propagation of EM wave is obtained from

A E x H B E.H

C E D H

268An electromagnetic field can exist if it satisfies

A Gausss law B Faradays law

C Coulombs law D All Maxwells equations


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269 If = 2.0 mho/m , E=10.0 V/m , the conduction current density is

A

5.0 A/m

2

B

20.0 A/m

2

C 40.0 A/m2 D 20 A

270 Maxwells equations give the relations between

A Different fields B Different Sources

C Different boundary conditions D None of these

271 The velocity of EM wave is

A Inversely proportional to B Inversely proportional to

C Directly proportional to D Directly proportional to 272

Velocity of a wave in a good conductor is

A Very small B Very large

C Moderate D None of these

273 If E = 2 V/m , of a wave in free space , (H) is

A 1 / 60 A/m B 60 A/m

C 120 A/m D 240 A/m

274If wet soil has = 10-2 /m , r=15 , r= 1 , f = 60 Hz , it is a

A Good conductor B Good dielectric

C Semi conductor D None of these

275If wet soil has = 10-2 /m , r=15 , r= 1 , f = 10 GHz , it is a

A Good conductor B Good dielectric

C Semi conductor D Semi dielectric

276 The cosine of the angle between two vectors is

ASum of products of the directionsof the two vectors

BDifference of products of thedirections of the two vectors

CProduct of products of the

directions of the two vectorsD None of these

277 The electric field intensity E at appoint (1,2,2)due to (1/9) nc located at (0,0,0) is

A 33 v/m B 0.333 V/m


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C 0.33 V/m D Zero

278If E is a vector , then . x EEEE is

A 0 B 1

C Does not exist D None of these

279The Maxwells equation .B = 0 is due to

A B= H B B= H /

C Non existence of a monopole D None of these

280 Velocity of EM wave in free space is

A Independent of f B Increases with increase in f

C Decreases with increase in f D None of these

281The direction of propagation of EM wave is given by

A The direction of E B The direction of H

C The direction of E x H D The direction of E.H282 For uniform plane wave propagating in z-direction

A Ex= 0B Hx= 0

C Hy= 0 , Ey= 0D Hz= 0 , Ez= 0

283For free space

A = B = 0

C J 0 D None of these

284 Velocity of propagation of EM wave is

A Sqrt(0 / 0 ) B 0 / 0

C 1/sqrt(0

0) D

0/

0

285 Electric field for time varying potentials

A E= - V B E= - V - A

C E= V D E= - V + A

286The intrinsic impedance of a medium whose = 0 , r= 9 , r= 1 Is

A 40 B 9

C 120 D 60


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287 For time varying EM fields

A

x HHHH = J= J= J= JB

x HHHH ==== D/t + JD/t + JD/t + JD/t + JC x EEEE = 0= 0= 0= 0 D None of these

288The wave length of a wave with a propagation constant = 0.1 + j 0.2

A 10 m B 20 m

C 30 m D 25 m

289 The electric field just above a conductor is always

A Normal to surface B Tangential to source

C Zero D 290

The normal components of Dare

AContinuous across a dielectric

boundaryB

Discontinuous across a dielectric

boundary

C Zero D

291 An antenna is a synonyms to a

A Generator B Transformer

C Regulator D Reflector

292A unipole is also known as

A Omnidirectional radiator B Unidirectional director

C Line radiator D None of the above

292The directive gain of an antenna is given by

A

Radiation intensity in a particular

direction / maximum radiatedpower

BAverage radiated power/maximum

radiated power

CRadiation intensity in a particular

direction / average radiated powerD

Average radiated power / radiation

intensity in a particular direction

293 The numeric value of directive gain may lie between

A - 1 And + 1 B 0 and 1


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C 0 and D 1 and

294Which of the following constitute the loss resistance of an antenna ?

A Dielectric loss B Leakage loss in insulation

C Loss in earth connection D All of the above

295 In case of antenna the ratio of the power radiated in desired direction to the powerradiated in the opposite direction is known as

A Transmission efficiency B Front to back ratio

C Loss coefficient D None of the above

296 Front-to-back ratio can be increased by

A Sacrificing gain B Increasing the size of conductor

CUsing the materials of high

conductivityD All of the above

297A half wave dipole used at a frequency of 300 MHz has a length of

A 10 m B 3 m

C 1 m D 50 cm

298A vertical earthed antenna is resonant when its physical height is equal to

A

B /2

C /4 D /8

299A folded dipole antenna is conveniently connected to

A Shielded line B Two wire line

C Coaxial line D Flat ribbon type transmission line

300The bandwidth of an antenna is

A Directly proportional to Q B Inversely proportional to Q

C Directly proportional to Q2 D Inversely proportional to Q

2


65/262

1. F

A F T B F S

C L T D Z

2. Z

A 1 B 0

C D 1/

3. D F T

A D F

B C

C C

D N

4. C

A B

C D

5. 2 H . W

?

A 4 B 0.25

C 2.5 D 5

6. D

A

B

C

D N

7. F /

A F B I

C W

D N

8. F

A P B A

C Q D A

9. F ,

A ()=0 0

C ()=1 0

10. F LTI , (), () () ,

, ?

A ()=() () B ()=()*()

C ()=() () D ()= ()()


66/262

11. L

A C B D

C B

D N

12. U ,

A V B

C M D

13. T L

A 1/ B 1/(+)

C /(+) D /(+)

14. T

A A B S

C O D S

15. F F

A S

WN

B P WN

C B

WN

C A WN

16. A

A N B A

C A

D N

17. T

A A B A

C A

1

D N

18. T

A 1 B 0

C D

19. T /

A H 2 ,

,=1,2,3,4

B H

C H /2 D H 2 ,

,

,=(+/) 1,2,3.


67/262

20. T

A S/ B X

C / D X+

21. T

A T B G

C S D N

22. F ,

A L B F

C D H

23. T F

A B C

C S D O

24. T F

A O B E

C C D S

25. A

A A B A

C M

D I

26. T F 2/

A S B C

C S () D ()

27. T (/4)(1)

A 1/8 B 8

C 4 D 1/4

28. T

A P B N

C C D E

29. P

A L B N

C B

D SECOND ORDER SYSTEM

ONLY

30. F (), F()=

A 1/ B 2/


68/262

C D 2

31. I LPF

A N B C

C FIR D U

32. ()=(M)

A B

C D

33. I () , F

F

A B

C D

34. I () , F

F

A B

C D

35. A

A ()=() B ()=()

C ()=() D N

36. O

A 1 B

C +1 D 1

37. M

F ?

A T B F

C D

38. D F /

A F B I

C P D P

2

39. F

A S

B I

C T

D N

40. I () , F()

A B V*

C V/ D V*2


69/262

41. U

A A

B A

C A

D P

42. E N ,

,

A F B S

C M D A

43. R

A L B H

C N D B

44.

T ()=(1)

A 6 B 4

C 2 D 1

45. T F ()=

A A B A

C A D A

46. T T

A T.

B 2T.

C

T.

D

2T.

47. T F T = T

/ 2 = +T / 2

A . B .

C . D .

48. T ( ) = ( )+

A L B L >0

C L


70/262

C 3 H D 4 H

51. T 1 () 2 () 2 () = 1 ( ). I

, ROC

A T B R

C N D C

52. T F (FT) () X (). T FT

( )/ A X()/ B 2 X( ).

C X() D X( )/( ).

53. I F ()

A 0.5 ()+1/() B ()+1/()

C 0.5 ()+1/(2) D ()+1/(2)

54. T () = () . T BIBO

A B A

C >1 D


71/262

C 3 D 4

60. M (/)

A B /2

C 2 D /4

61. T

A U B R 1

C D R

62. I () T ()=( + T/2) ,

F ,

A

.

B

.

C

.

D

.

63. A

A A B A

B A D A

64. F , ROC

A E B I

C R D U

65. F , ROC

A E B I

C R D U

66. F , ROC

A E B I

C R D U

67. F

A B F

C I D DFT

68. I , =1

A A B A

C A D A

69. T ROC

A B

C P D

70. D F


72/262

A T B P

C F D A

71. I , ()X(), ()

A X()/ B X()/

C D X()/

72. I N DFT,

A N

B 2N

C N/2

D N2

73. C

A L B P

C S D N

74. I ()=1,1,1,1, 4 DFT X(0)

A 0 B 4

C 1 D 2

75. DFT

A S DTFT B I DTFT

C S DTFT D S

76. T () () ( ), > 0

A B 1/

C 2 D 0.5

77. I () ,

A U B

C E D

78. F DTFT , ROC

A U B

C P (1,1) D N

79. T ROC

A A B A

C U D E

80. F ,

A B

C R/ D D/


73/262

81. F ,

A B 0

C 2 D /2

82. P DTFT

A 2 B

C /2 D /4

83. I ()=(200 ) T=1/400 ,

()=

A S(/2) B S(/4)

C S (/8) D S (/2)

84. D T F T

A P

B A

C P

D A

85. T LTI ()=4()

A B

C N D FIR

86. T (/3) (4000 ) , T

A 1200 B 12000

C 120 D 12

87. I ()=(()),

A B N

C LTI D N

88. T

A B C

C P D E

89. A

A C B N

C C D C

90. A

A F B F

C D D F T

91. I

A ()=() B ()=(+)


74/262

C ()=() D ()=()

92. DTFT

A S DFT B I DFT

C D DFT D N

93.

A C

B I

C I

D A

94. T ,

A B

C C D N

95. DFT

A E

B S

C F D A

96. D DFT

A G

B L

C E H

D

97. N. DTFT

A B

C N D 2N

98. DFT

A R B I

C C D I

99. DTFT

A C B C

C C

D C

100. FFT

A DFT B DTFT

C DFT

.

D

101. I , K

A R B C


75/262

C L D 1/C

102. M

A R

B R

C R

D N

103. I ,

A B M

C E D

104. T

A B

C D V

105. A

A A

B A

C A

D A

106. I ,

A T

B T

C T

D N

107. W ?

A B

C D P

108. W ?

A B

C D B

109. F I ,

A 0 B 1

C D 1/K

110. F I ,

A 0 B 1

C D 1/K

111. F 0 ,

A 0 B 1


76/262

C D 1/K

112. T 180

A P

B S

C F

D G

113. T . T

A V B

C V D

114. A

A G B G 1

C G 1

D G

180

115. I

A R B M

C B A B D N A B

116. T

A T B T

C T D T

117. A

. T

A B

C M D H

118. A

A S

B I

C I

D N

119. T

A S

B S

C M

D N

120. I , G()H()

A E

B O

C O

D T


77/262

121. I ,

A L B E

C A

D N

122. I ,

A A

B A

C A

D A

123. T

A U

B D

C R D C

124. I ,

A B

C V D

125. F ,

A B

C D

126. T

A U

B D

C B A B D N

127. I ,

A 1 B M 1

C L 1 D

128. T

A H B B H B

C H B

D H B

129. A 1 98%

. I ,

A 1 B 0.5

C 0.25 D 0.1

130. A

A H B L

C B D B


78/262

131. A

A V

B L

C H D N

132. PID

A P I

D

B P I

D

C A 3

D A 3

133. T

A S

B T

C 3 D S

134. O

A A B S

C I D N

135. N

A C B C

C M

D N

136. A ,

A G B G

C M

D D

137. T

A N B N

C B D R

138. M

A V B P

C C D F

139. R

A H B P

C E D N

140. I

A F B T


79/262

C F D H

141. T

A B B B

C D

D D

142. I ,

A 1/ B

C 2 D +A

143. I ,

A D B N

C B

D N

144. I ,

A P B I

C N D

145. T G()=1/[(1+)(1+2)

A D B C

C C

=0.7 /

D C =1.4

/

146. A , 1/(1+T)

A 90 B 90

C 45 D 45

147. I B ,

(1+T)

A 20 B/ B 10 B/

C 20 B / D 10 B/

148. A

A O

B T

C T

D Z

149. A 12 2 . I

A 200 B/ B 240 B/

C 280 B/ D 320 B/

150. M

A N

B I


80/262

C C

D A


81/262

1 A 300 K

= 0.21 0.18 .

A 0.69 B 0.83

C 0.61 D 0.88

2 A = 300 K ND = 1014 3 NA=10

173.

A 0.63 B 0.93

C 0.026 D 0.038

3 A . ,

90% ,

A 59.6 B 2.7

C 30.4 D 12.0

4 A = 300 K N A

=10173 ND= 5 10153, F

A 0.1 B 0.2

C 0.3 D 0.4

5 A .

, 9,

A 83 B 59

C 43 D 31

6 A

A B

C D

7 I ,

A

B

C

D


82/262

8 I ,

A B

C ( )/2 D ( )/2


83/262

9 (

K)

A B 1.5

C 2 D 1/

10 (

K)

A B 1.5

C 2 D 1/

11 I

/

A 2.5 / C B 2.5 / C

C 25 / C D 25 / C

12 I

A B C D 1

13 I

A B C

/ D

1

14 I C ( )A B C

1 D 15

A ln B ln

C

ln D

ln

16 FE

A

B

C

D

17 %

A + 100% B 100%

C 100% D + 100%


84/262

18 A

2 B 2C

D

2


85/262

19 A

2 B 2C

D

2

20 A

2 B 2C

D 2 21

A2 B 2

C

D

2 22 (F) A 0.406 B 0.286

C 0.693 D 0.512

23 (F)

A 0.406 B 0.286

C 0.693 D 0.512

24 ()

A 1.41 B 0.48

C 1.11 D 1.21

25 ()

A 0.48 B 0.68

C 0.28 D 1.21

26 ()

A 23.1% B 40.6%

C 46.1% D 20.1%

27 ()

A 68.1% B 81.2%

C 40.6% D 92.1%

28 I ,

A

/2 B

C 2 D 3

29 F .

= 0. C

.


86/262

A B

C D

30 F .

= 0. C

.

A B

C D

31 I , 1 2 .

A 0, 4 A B 4 A, 0

C 0, 8 A D 8 A,


87/262

32 F . A = 0.

A B

C D

33 I ,

0.6 . ON

A 1 B 2

C 1 2 D

34 F , = 0. 4 . ,

A 6.25 B 12.50

C 25 D N

35 I

A 1.4 A B 2.3 A

C 1.8 A D 2.6 A


88/262

36 A

A B

C

D

37 I ,

A 100 A0 B 0.1

C 1 D 5

38 I ,

A 1 103 B 1 105

C 1 107 D 1 109


89/262

39

A B

C

D

40 I ,

( )A B 1C

1 D 141

A B

C D

42

A

B

C

D

43 A 250 C, 2 , 500 C

A 2 B 1

C 2 D 2

44 ON FE :

A B

C

D

45 D FE A 1

B 1

C 1 D 1 46 FE

A 2 1 B 2 1

C 2 1 /

D . /


90/262

47 I JFE

A 1 B 10

C 10 M D 100 M

48 M JFE

A B

C D


91/262

49 I N ,

A B

C

D

50 A ,

A B

C D

51 :

( B E )

A = 1 B 1C

1 D = 552 I BJ , ,

A B

C D

53 BJ

A 0.01 B 1

C 100 D 10

54 I BJ , A

1 + B 1 C

1 + D 1 55 I BJ

( E C )

A

B

C

D

56 I BJ, = 1 = 0.99 A 0.01 B 0.1 C 1 D 100


92/262

57 I BJ, = 0.98 A 49 B 98

C 0.49 D 980

58 I BJ, = 100 A 99 B 0.99

C 1.0 D 1.01

59 I BJ,

A 10 B 100

C 1 D 1

60 I

A B

C D,

61 I BJ, (E) , (B)

(C)

A E > C > B B B > C > E

C C > E > B D E = C > B

62 BJ

A , B ,

C ,

D

,

63 EM CB A = + B = + C = + / 1 D = + / 1

64 , 1 A ,

CE :

A = 100 = 10 = 50 = 1 B = 5 = 10 = 200 = 20 C

= 5 = 0 = 20 = 3 D = 100 = 10

= 100 = 10 65

E . H,

A B

C

D

66


93/262

A

B

C

D

67

BJ

A

B

C

D

68 A IC 110 .

A I B MI

C LI D LI

69 I JFE , ,

A = B = C = . D = .

70 JFE A 1 B 1

C 100 D 1000

71 JFE A 1 B 10

C 500 D 100 M

72 MOFE A 10 B 500

C 10 M D 100 M

73 MOFE

A 0.01 B 1

C 10 D 100

74

A JFE B BJ

C MOFE D


94/262

75 JFE

A B

C

D

76 FE

A B

C D

77 ED

(E )

A NN B N

C JFE D MOFE

78 A (FE)

A B

C

D

79 FE

A = 0 = 0 B = = 0C =

= 0 D 80 I MOFE A B

C

D

81 I BJ

A B

C

D

82 A BJ

A

B

C D


95/262

84 F JFE

( )

A

B

C D

85 A MOFE

A 2 B 3

C 4 D 5

86 F MOFE,

A B

C

D

87 C :

( MOFE 1. 2. 3. I

O

A 3 B 1 2

C 1 3 D 2

88 ( MOFE A

B

C

D

89

A B

C D

90 CE

A B + 1C

1 + 1 D + 191 CE

A + 1 1 + + 1 + B + 1 + 1 +

C1 +

+ 1 + D

+ 1

+ 1 +


96/262

92 ( = = A = B = C = D = 93 I CE , A =2 B >2 C


97/262

101

A CB B CE

C CC D

102 C

A1 + B 1 +

C1 + D 1 +

103 C

( )A B C

D

104

A

B

C

D

105 O CC

A CE CB

B

C CE CB

D

106 I CC

A

B

C D

107 I CE , A

B

C D 108 I CE ,

A B + C / D /

109 I CE ,

CC

A 3 B 100

C 1000 D 0.01


98/262

110 CE 1 2 A

2+ B + C + D + 111 A

B 2C

2 D 112 I CE ,

A

B

C

D

113 A A B

C,

D

,

114 I AB ,

A B

C L D

115 I C CE ,

A B

C

D

116 I C CE , 3B

A

B

C

D

117 3B

A2 1 B 2 1

C

D


99/262

118

A B

C D

119

A C B D

C D I

120 I

A

B

C D

121

A CA B CB

C CC D CAB

122

A CA B CB

C CC D CAB

123 C ,

A

B

C

D

124 I C ,

A B

C D C

125 I ,

A B 1 C 1 + D 11 +

126 I ,

A

B

C

D


100/262

127 FE

A B C

C D C

128 BJ C

A1 B 3 16 + 4

C1 129 D 1 16 + 4

129 I BJ C

A B 1 .

C 1 + .

D 1 .

130 F BJ C 3

C , ( = )A > 29 B >4 + 23 + 29C >4 + 29 D >23 + 29

131 F

A L B

CM

D D

132 I , 0.2 .

A 6 B 8

C 6 D 8

133 C , I = 2 ,

A 4 B 6

C 3 D 6

134 F OA B


101/262

A B

C G D

135 F OA ,

A 2 B 1

C 0.5 D 0.5

136 F BJ , = 0.7 . BJ

A B

C D

137

A B

C D

138 F = = 50.

A 0.9 B 1.19

C 2.14 D 2.84


102/262

139 555

A 0.69 + 2. B 0.69 + . C

0.69 . D

1.44

140 F 555

A 1.44 / + 2. B 1.44 / + . C . D 1.44

141 O

A 1.34 . B 1.1 . C . D 1.7 .

142

A

B

C D

143 A

A B

C

D

144 E

A B

C

D

145 C

A B

C D

146I ,

A CB B CE

C CC D

147 A CB

A B

C D


103/262

148 C

A B

C D

149 N

A ,

B ,

C , D ,

150

A B

C D


104/262

1 R

A B

C D

2 A

A B

C D

3

A B

C D

4 A

A

B

C D

5 A

A B

C D

6 F

A K' B

C M D N

7 D.C.

A

B D.C.

C

D N

8 A

A D.C.

B

D.C.

C

D.C.

D

9 B


105/262

A B

C D

10 I A ,

A

B

C D

11 F ,

A B M D '

C D A

12 F

A A B M'

C H D A

13 I 80,

A 10 B 80

C 120 D 170

14 I

A B 1

C 5 D 10

15

I

A

B

C

D A

16

A B

C D

17

A B


106/262

C D

18 C

A B

C D

19 F ,

A M' B M

C H' D A

20

A B

C D

21

A B

C D

22 Q :

A

R

.

BR

.

CR

.D .

23

A B O

C /O D O/

24 PMMC DA

A DC B AC

C B DC & AC D N

25

A P B

C R D A

26

A E B O


107/262

C E D I

27

A A B

C D A

28

A D B C

C D D A

29 A

.

A B

C D

30 A

A B

C D

31 A

A

B

C

D

32

A B M

C C D A

33 I

A B

C D

34 A

A B

C D

35 .


108/262

A A B P

C D I

36 , LD

A A B P

C A D P

37 A

AM

B

Pressure into a change of resistance

C F DForce into a displacement

38 P .

A M BVibrations

C I D H

39 I LD,

AA

B

Vary unequally depending on the core

position

CVary equally depending onthe core position

D Are always in phase quadrature

40 LD

A J B F

C L D H

41 LDR .

A R B I

C R D D

42

A B E

C D LD

43 LD

ASelf inductance

B M

C R D P


109/262

44 1: .

2: .

A 1 & 2 B 2 & 1

C B 1 & 2 D B 1 & 2

45

AD

B

D

C

C

DMovement of magnetic field producesvariation in resistance of material

46

A LDR B P

C P D P

47 BH C :

A H B I

C E D B () (

48 I CRO

A B

C E D B

49

AA C

B DC

C 50 H 60 H D

50 H B :

A I Q>10 B I Q


110/262

C 0.92 D 0.25

52

I ?

A M B

C L D H

53

?

A F B

C D P

54

?

A B E

C D LD

55

A B

C D

56

A Electrometer B Galvanometer

C Voltmeter D Coulometer

57

A 10 ,

.F

A 20/3 B 10/3

C 203 D 103

58

A

A Low internal resistance B High internal resistance

C Electrostatic plates D A sensitive amplifier

59

A Highly inductive B Highly resistive

C Purely resistive D Purely inductive


111/262

60

CRO . I ,

. .

A The signals are not sinusoidal BThe amplitudes of the signals are very

close but not equal

C

The signals are sinusoidal with

their frequencies very close but

not equalD

There is a constant but small phase

difference between the signals

61

I ,

,

A P B P

C P 0.5 D P 0.5

62

A

AG

B

I , ,

CG

DG

63

A

B

CF

DB

64

A B

C N D

65

?

A A B Aperture droop

C F D Acquisition jitter

66 ,


112/262

A Drawing graph B Indicating direction

C Calculating length D Measuring at a distance

67

C

A Frequency modulation B Pulse amplitude modulation system

C Impulse counting system D Impulse frequency system

68

AMechanical displacement in to a

change in resistanceB

Resistance in to a change in

mechanical displacement

CCurrent in to a change in

resistanceD None of this

69

I CR , ,

A The spot screw B Holding switch

C The control grid D First anode

70

I

A Quadrupole lens B Increasing current

C Control grid D Deflection plates

71

A Voltage and curent B Current and inductance

C Voltage and frequency D All of above

72

A 1 A 100

0 100 A .

A 9.10 B 1.01

C 0 D 10

73 R


113/262

A Power factor B Form factor

C Phase value D N

74

D ()

A Low B High

C Value does not affect sensitivity D None of this

75

CR

A Meter/Volt B Volts

C Volts/Meter D Volts/Time

76

A Ratio of rms value to peak value B Ratio of value of current to rms value

CRatio of value of current to value

of peak valueD Ratio of peak value to rms value

77

A Less than 100 mV B Greater than 1 V

CThermocouples vary resistance,

not voltageD None of this

78

?

AFor extremely low-voltage

applicationsB

To provide power to a circuit when

power is lost

C To control low-voltage circuits D

To reduce radiation of high

frequencies during turn-on of a high

current to a load

79

A Thermocouples B RTDs

C thermistors D All of the above

80

Ato decrease temperature

sensitivityB to increase voltage output


114/262

Cto cancel unwanted voltage

output of a thermocoupleD used for high-temperature circuits

81 .

A A B

C P D I

82

A PMMC B M

C I D N

83E :

A H B L

C L D H

84M :

A H B L

C H D L

85

A LDR B P

C P D P

86 :

A M B H

C PMMC D E

87LD

A B F

C A D C

88

?

A F B

C D P

89 :

A B L


115/262

C D N

90

, LD A A B A

C P D P

91

C

.

A P B

C P D P

92

LD

A B R

C M D P

93A

A A B D

C A D P

94A

A A

B

E

CE

D

E

95 :

AH

B M

CH

DM

96 P :

A I B C

C C D R

97P

A

B

C

D


116/262

98 :

A

B

A C M D

99I ,

A

BC

CC

DC

100 :

A

I

BI

C I D I

101

LDR .

A R B R

C I D D

102D

:

A

H

B

C)

D

A

103

A H B H

C B D F

104 LD

A J B L

C F D H

105A O :

A B A

A D N


117/262

106P

A B R

C

D

F

107

A ) I B )

C ) R D ) P

108 A :

A) H

B) L

C ) E D ) L

109A :

A) D

B) B

C ) A D ) /

110 C

A ) B )

C ) D D ) B

111 ?

A ) B )

C ) E D ) LD


118/262

1

A a

A Daaec aea B Feaec aea

C Paaaec aea D Deecc aea

2

Reae eeab f A

A 1.00000065 B 1.00000079

C 1.00004 D 1.0001

3 Ba ca

A 1.381 X 1023 J/K B 1.381 X 1023 J/K

C 1.381 X 1023 V/K D 1.381 X 1023 V/K

4 Cdc f Se ed ae de ____/ee

A 3.82 X 107 B 4.10 X 107

C 5.80 X 107 D 6.17 X 107

5

Cdc f Gd ed ae de ____/ee

A 3.82 X 107 B 4.10 X 107

C 5.80 X 107 D 6.17 X 107

6

IEEE cae feec bad K ______GH ae

A 8.000 12.000 B 12.000 18.000

C 18.000 27.000 D 27.000 40.000

7 IEEE cae feec bad X ______GH ae

A 8.000 12.000 B 12.000 18.000

C 18.000 27.000 D 27.000 40.000

8 A cdc f _____ cdc ad ____ eeab a c

edace.

A L, L B L, H

C H, L D H, H

9 Pce adaae f cae e feec

A Iceaed badd B Iceaed ac

C Ab e a,

dec aea

D A f e abe

10 Mcae ae efeed f TV a becae


119/262

A Of a S/N a B Te dce e ae

d

C Te ae eae

ceae

D Te ae fee f e

e

11 Ra d aea cae caed de

A Scae f cae

b ae d f ecfc

e

B. Scae f cae b a

cec f de ac f

a e bd

C Ab f cae

b ae cee

ea f e d

D Ab f cae b

ae a e

aee

12 Sadad ac cae cc ae SWR f

A 0.5 : 1 2 : 1 B 1 : 0 2 : 1

C 1.2 : 1 2 : 1 D 1.33 : 1 2 : 1

13 I cae e ae e eee a

A Led cc eee B Dbed cc eee

C B a ad b D Ne f e abe

14 Mcae eeae ae ca 50 aa

A Becae f ea

cae

B Becae f aec

aea

C Becae f bee a

D T ee a e aed dcae ecee

15 We e feeace aee f a a ea e c ff

aee f de

A Te ec f e

a bece e.

B Te ae

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