IES Electrical Engineering Objective Paper 2014

8/10/2019 IES Electrical Engineering Objective Paper 2014

1/44


2/44

1 T h

e elect

ri cfield

l ines an

dequi

po ten t i

a l l ines

4

a) are

paral

le l to e

achothe

r

b)

are on

e an

d the s

ame

c)

cut each

oth

er o

rt hogon

ally

d)

can

be

inclined to each

other

at

any

a

ngle

The

d

epth o

fpene

tration o

f a w

ave in

a

lossy

d

ie lectr

ic m e d i

um in

cre ses

with

a)

Incre

as ing w

avelen

g th

b) Inc

reas ing

condu

cti vity

c)

D

ecreasi

ngw av

e leng th

d) Increas in g p erm it t ivi ty

2

Ac

cording

to

Gauss

s

Law

, the s

urface i

n tegra l

o

f the

norm

al com

ponent

of ele

ctric f

lu x

den

si ty D

over a

closed

surfa

ce cont

a in ing

c

harge Q is

5

C onsid

erthe

fo llowi

ng s

tateme

nts associa

ted

wit

hthe

basic e

lec trost

atic pro

p ert ies

of idea

l

condu

cto rs :

3.

a)

b)

c)

d)

C onsid

er the f

ollowing

sta

tement

s

:

Acu

rrent I f

lows throu

gh a

c ircula

r coil of

one

turn

of radius R

in

the

cou

nte r-clo

ckwise

direct

io n.

1 T

he m a

gn etic

field at

th

e

ce

ntre

is

inverse

ly propo

rtional

toR

2.

6

T h

e m ag

ne t ic m

oment

of the

coil i

s

2

7

di

rectly p

roport i

onal to R

.

3.

The

m agne

tic fie

ld at

it s cen

tre is

dire

ctly pr

oport ion

al to

R

2

.

W hic h

of the

above

sta tements

is /are

correc

t?

(

a)

1 and

2

b )

1only

c)

2

and 3

(d) 3

only

BDM

HHN F

FA

2

-A

1.

T he re

su ltant

f

ie ld ins

id e is z

er o.

2.

The ne

t charg

e dens i

ty in th

e interi

oris

ze ro.

3.

Any

net char

g es res

ideo n the

surf

ace.

4.

The s

urface i

s alway

s equip

o tent ia

l.

5.

Th

e field

ju st outs

ide is z

ero.

W

hich o

f the abOv

e

statem

ents are co

rrect ?

a) 1

,2, 3

and 4

b)

3 4

and 5 onl

y

c)

1

, 2a

nd 3 only

d) 2

and

3

only

I

n practi

ce , E

arth

is

ch

osen a

s a plac

e of zer

o

elec

tr ic po t

en t ia l b

ecause

it

a)

isnon

-c onduc

ti ng

b )

is eas

ily avai

la b le re

ference

c)

keeps

losing

and

g a

in ing e

le ctric c

harge

. e

veryda

y

d)

has a

lm os t c

onstant

poten t

ia l

The

capac

itance

of a

c oncen

tr ic sp

h erical

capa

citor o

f sh ell ra

dii x and

y (x

> y} is

a

}

l n ~

4

1lo

Y

b )

41leo

xy

x y

c)

y

411

0

n

X

d)

1

J

41lo

y

X

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3/44

8

The fre

quency of

the power wave a

ssociated 13

with

an electromagn

etic wave hav

ing an E

9

1

0

fie

ld as E

=

e....vr,

cos rot-

,

i

s given by

a)

b)

c)

d)

I)

8 1

j)

4 1

j)

2 1

j)

l

W he

n the wave

travel s in

a

co nducting

medium

, the rate of at

t enuat ion is de

cided by

(a) A

ttenuat ion con

stan t

(b) Pha

se constant

c)

Bot

h a t t enuat ion

co nstant a

nd phase

cons tan

t

(d)

Nei ther a t t enu

at ion cons tan

t nor phase

cons ta

nt

Uniform

p la ne wave is

(a) Long

itud inal in

nature

b) Transv

erse in na

ture

c)

Nei the

r lo ngi tudinal

no r t ransver

se in

nature

(d) x-

directed

11 The impedance

Z o ffered b y t

ransmission l i

ne

for a tr

ave l l ing wave

w hi ch damps

out the low

frequency

osc illation ra p

idly is also cal

led

12

(a) Surge i

mpedance

(b)

Natural impe

dance

c)

Bo

th surge and na t

ural impedan

ces

(d)

N either surg

e nor natural i

m pedance

In a coaxial

tra nsmission

li n e, the us

eful

power

flows through

(a)

the interface o

f thetwo condu

cto rs

(b) both inner a

nd outer

conductors

c) inner conduc

tor

(

d) outer

con

ductor

14

15

16

B DMHH N

FFA

( 3 -A )

For a l ine

to have a

purely resis

tive

characteristic i

m pedance

a)

b)

c

)

d)

C R

G L

ro -

roC

R=G

GL=RC

where

R and a

re resis

tance and

conducta

nce per unit l

ength respecti

vely and

and C

are

inductan

ce

an

d capaci

tance per

u

nit

len

gth respective

ly.

A semicondu

ctor device

m ade out of

a

m aterial having v ery high te mpera ture

co

efficient of resi

s tance is

(a

) Trans i s tor

b) Varistor

c) Thyris

tor

(d) Ther

m istor

The e

lectrical condu

ctivity of a sem

iconductor

increase

s w ith incre

ase in tem

perature

becau

se

(a)

the carr ier conce

ntra tion increa

ses

b) the

mobil

ity o f carr ier in

cre ases

c)

both carr ier

con centration

and mobility

in

crease

(d) th

e band gap decr

eases

Which o

f thefollowing

are associated

withsoft

supercon

ductors ?

1. Silsb

ee s ru le

2. M eissner eff

ect

3.

Faraday

ro t

ation

4. Curie-Weis

s la w

(a) 2, 3

and 4

b) 1

and 3only

c)

1 and 2 o

nly

(d)

2and 3 only

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4/44

17. In

a tw

o-chan

nel os

cillosco

pe ope

ra ting in

21

.

x-y m

od e, t

wo in -

phase

50Hz

sinuso

idal

w ave

fo rm s

of equa

l am pl

itude

are fed t

o th

e

two

channe

ls. W

hat wil

l be

the re

sultant

pat t

ern on

the scree

n

?

a)

An

ellipse

b)

A pa ra

bo la

c)

Stra

ight l ine

inclin

ed at

45

with

respe

ct to x-a

xis

d)

A c i

rcle

18

.. M at

eria ls,

whose

resist

iv ity at

ver

y low

tem

peratu

res p l

unges

from a

fi nite v

alue t

o

ze

ro an

d rema

ins th

ere upon

further

co oling

,

areknow n

as

19.

20

.

a)

Ferrom

agnetic

m ater i

a ls

b)

H i

gh-ene

rgyhard

m agn

eticm

aterials

c)

Su

percon

ductors

d

) Fer

rim agn

eticm

aterial

s

In

a

superc

onducto

r,

i f

th

e temp

erature

i s

decrea

sed be l

ow i

ts critical

temp

erature

the

value ofcritic a l m agnetic fieldwill

a)

Increa

se

b)

D ecrea

se

c)

N ot c

hange

d)

Incre

aseor

decreas

e depe

nding o

n the

su

percon

ductor m

a teria

l

T

he im a

g inary

par

t

of die

lectric

const

ant

determ

ines

a) C

om pon

entof

curr

ent w hich is

in

pha

se

with

theapp

lied fiel

d

b) Co

m pone

nt ofen

ergy ab

sorbed

pe rm3

c)

A m oun

t ofapp

liedfiel

d

d) C

om pon

ento

f

v

oltage

which i

s

i

nph

ase

w

ith th

e

a

pplied

field

2

2.

23.

24.

25

8-DMH

H-N -F F

A

4 -

A

C

urie Ja

w of

param

agneti

sm w it

h =

susc

eptibili

ty, B =

flux

density

a

nd C

=

a

c

onstan

t) is

a)

x

CT

b)

C

B

x

T

c)

CT2

x

2B

d)

c

x

T

If

the m ag

netic s

usceptib

ili ty o

f a spec

im en is

sm all and

posi

tive, th

e specim

enis

a)

D ia

m agne

tic

b)

P

arama

gnetic

c)

Ferrom

agnetic

d)

N

on-m a

gnetic

M a

nganes

e ferrite

is a 1

: 1 m ix

tureof

a

) M a

nganes

e n itr id

e and

ir

onoxid

e

b)

M a

nganes

e oxide

a

nd i ro

n oxide

c)

M a

nganes

e n itr id

e and ir

onsulp

hide

d

) M a

nganese

oxide

andiro

n su lph

ide

W hen

a

ferroma

gnetic

subs

tance

is

m agnetized, sm all changes

in

dim ensions

o

cc ur. Su

ch a ph

enom en

onis k

now n

as

a) M

agneti

c hyste

resis

b)

M agn

eti c ex

pansion

c)

M a

gnetost

riction

d

) M a

gneto-c

alo risat

io n

In fe rrom

agneti

c, ant

i-ferrom

agneti

c and

ferrim

agnetic

mater

ials ,

the atonl

ic ther

m al

m otio

ns co

untera

ct the

coup

ling f

orces

betwee

n th

e

a

djacen

t atom i

c dipole

mom e

nts,

the

reby ca

using

a

) Som

e dip o

le m isa

lignm en

t regar

dless

of

wh

ether an

exte

rnal fie

ld is pre

sent

b)

Inc

rease in

dipole

align

ment re

gardles

s

ofwheth

er

an

externa

l field is

presen

t

c) No

effect

on dipo

le a l ign

m en t

d)

Atom

s ten

d to

de-ra

ndom iz

e the

d

irection

ofm om

ents

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5/44

26.

he Hall

Effect voltage in intrinsic silicon

a) is positive

b)

is zero

c)

is

negative

d) changes

its

sign based on application of

magnetic field

27. Most

outstanding

property

of

indium

antimonide is

a)

A

very wide range

gap

b) lligh resistivity at room temperature

c) High

carrier

mobility

d) Very low conductivity at room

temperature

28. ,

Which

of

the following semiconducting

compounds is used

in

photoconductive

devices?

a) Caesium antimonide

b) Barium oxide

c) Lead sulphide

d) Zinc oxide

29. A magnetic ring

has

a

mean

circumference of

20 em and a cross-section

of

20

cm

2

and has

30.

31.

32.

800 numbers

of

turns

of

wire. When

the 33.

exciting current is 5

A, the

flux is 2 mWb. The

relative

permeabili ty of

iron is nearly

a) 398

b) 398

c) 0398

d) 398

B-DMHH-N-FFA

(

5 -A

The

voltage and current waveforms for an

element are shown in the figures.

i t) v t)

2A

.

2V I - - -

2s

Time

2s

The circuit element and its

value

are

a)

Capacitor

and

2 F

b)

Inductor and 1 H

c)

Inductor

and 2 H

d)

Resistor and 1

Q

For

a series R-C circuit,

the

power

corresponding to maximum power is

a) 05lag

b)

05lead

c) 0707 lag

d) 0707

lead

Time

factor

The power consumed by a coil is 300 W when

connected to a 30 V de source and 108 W

when

connected to a 30 V ac source.

The

reactance of the coil is

(a)

3

Q

b)

4Q

(c) 5 Q

d) 667 Q

A conductor of diameter d, length consumes

power of W when a current I flows through

it.

What

will

be

the

power consumed

if

d

is

doubled, is halved and current is

tripled

? .

a) 18 W

b)

36W

c)

48W

d)

72W

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6/44


7/44

41

.

T

he

re a

re

no

tr

an

sie

nts

i

n pu

re

r

e s i

s ta

n c

e

44

.

c ir

cu

its

bec

au

se t

hey

(a

)

O

ffe

rJ r

igh

res

is t

an c

e

(b

)

O

be

y O

hm

s la

w

c)

H

av

e

no

sto

red

en

e rg

y

(d

)

A

re li

nea

r

cir

cui

ts

42 .

B

sh

o w

n in

th

e

f

ig u

re ,

1 Q

re

s is

tan

ce

i

s

c

on

nec

ted

ac

ro

ss a

so

ur

ce t

hat

ha

s

a l

oad

l

ine

v

+

i

=

10

0

Th

e c

ur r

en t

th

rou

gh

th

e

re

sis

tarl

.ce

is

S

our

ce.

v

a

)

2

5A

b)

5

0 A

c)

100

A

d

)

20

0 A

i

43.

Th

ei

nit

ial an

d

fi n

al

va

lue

s of

lQ

f(

t) =

15

lO

t-

lO

e-

201

ar

e

re s

pe

ctiv

ely

(a) 5

a

nd

=

(b

)

5 a

n

d

=

c)

15

a

nd

=

(d)

1

5

and

10

4

5 .

4

6 .

B-D

M

HH

-N -

FF

A

7 A }

Th

e po

le -

zer

o pa

tte

rn

o

f

a ce

rta

in

f

i l t

e r is

s

how

n

in f

ig u

re .

T

he

f

il te

r mu

st

b

e

j

ro

j2

j l

o

-

-

-

-

-

-

j l

j

2

-jro

(a

)

Lo

w-

pas

s t

ype

b

)

H ig

h-

pas

s t

ype

c)

B a

nd-

pa

ss t

ype

(d)

A

ll -

pas

s t

ype

A

s

ing

le-

pha

se

ac

vo

lta

ge

so

urc

e h

as

200

V

rm

s

and

a

s

ys

tem

c

onn

ec

ted

co

ns

um

es

an

a

cti v

e

pow

er

o

f3

00

W.

W

h

at

i

s

t

he

r

eac

ti v

e

pow

er

co

ns

um

ed

by

the

sy

ste

mif 2

5

A

rm

s

cu

rre

nt

is

d

raw

n?

(a )

lO

O

VA

R

(b)

20

0V

AR

c)

3

00

VA

R

(d

)

4

00V

A

R

T

he

tr

ans

fer

fun

cti

on

of

a

lo w

-p

ass

R

C

ne

tw

ork

is

(

a)

R

Cs

1

R

Cs

)

(b)

1

1

R

Cs)

c

)

R

C

1

RC

s)

(d )

s

1

RC

s)

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8/44

4

7.

An

RL

C

r

es

on

an

t

cir

cu

it

h

as

a

re

so

na

nc

e

5

1.

I

n

a

ba

lan

ce

d

3 -

ph

as

e 2

00

V

c

irc

il it

, th

e

li

ne

fr

eq

ue

nc

y o

f

1

5

M

H

z

an

d

ba

nd

w

idt

h

o

f

10

kH

z

. I

f

C

15

0p

F ,

t

he

n

e

ff e

cti

ve

r

esi

st

an

ce

o

f

t

he

c

irc

u i

t w

il

l b

e

a

)

> 2

9

5Q

b)

1475Q

c)

9

5Q

d

)

47

Q

48

.

C

on

sid

er

th

e

f

ol

lo w

in

g

t

w o

ty

pe

s

o

f

n

on

-id

en

tic

al

so

ur

ces

:

49

.

1.

2

.

V

ol

ta g

e

sou

rc

es

e

1

t)

an

d

e

2

t)

Cu

rr

en

ts

ou

rc

es

i

1

t)

an

di

2

t

)

R

eg

ard

in

g

th

em

o

de

of

t

he

ir

co

nn

ect

io

n i

n

a

circuit,

a

)

1

ca

nn

o

t b

e c

on

ne

ct

ed

in

p

ara

lle

l, a

nd

2

ca

nn

ot

be

co

nn

ec

te

di

ns

er

ie s

b)

1 c

an

no

t

be

c

on

ne

ct

ed

in

s

eri

es

, a

nd

2

c

an

no

tb

e

co

nn

ec

te d

in

p

ara

lle

l

c)

B

oth

1

an

d

2 c

an

no

t

b

e c

on

ne

cte

d

in

s

er i

es

d)

B o

th

1

an

d 2

c

an

no

t

be

co

nn

ec

te

d

i

n

p a

ra

l le

l

In

a

se

r i

esr

eso

na

n

t

cir

cu

it ,

m

ax

im

u m

v

ol

tag

e

a

cr

oss

L

oc

cu

rs

a

t

a)

R

es

on

an

tf

req

u

enc

y

b

)

S l

ig

h tl

y b

el

ow

re

son

an

t

fr

eq

uen

cy

c

)

S li

gh

tly

a

bo

ve r

es

on

an

t

fre

qu

en

cy

d)

A

t

a f

req

ue

nc

yw

h

ere

I

is

m

ax

im

um

5

0.

Tw

o

w

at

tm

et

er

s a

re

u

se

d

to

me

as

ur

e th

e

.

po

w

er

in

a

3-

ph

ase

b

a la

nc

ed

s

ys

te m

.

W

ha

t i

s

th

e

p

ow

er

f

ac

tor

o

f

th

e

lo

ad

w

he

n

on

e

wattmeter

r

ead

st

wi

ce

t

he

o

the

r

?

a

)

0

b

)

0

5

c

)

0

8 6

6

d)

1

cu

rre

nt

is

1

15

5

A.

W

he

n

the

po

w

er

is

me

as

ur

ed

b

y

tw

o

w

a

ttm

et

er

m e

th

od

, o

ne

o

f

t

he

w

at

tm

et

ers

r

ea

ds

20

k

W

an

d t

he

o

th

er

on

er

ea

ds

z

ero

.

W

ha

t

i

s t

he

p

ow

e

r fa

ct

or o

f t

he

l

oa

d?

a)

0

5

b

)

0

6

c

)

07

d

)

0

8

52

.

A

c

oi

l ha

vi

ng

an

in

du

ct

an

ce

of

0

5

H

a

nd

a

r

es

ist

an

ce

of

6

0

Qi

s

co

nn

ect

ed

in

s

e r i

es

w

it

h

a c

ap

ac

ita

nc

e

of

10

J.

lF. T

h

e

co

il

is

co

nn

ect

ed

to

1

00

V

a

c

su

pp

ly

.

W

h

at

is

th

e

so

ur

ce

fre

qu

en

cy

a

nd

c

ur

ren

t

flo

w

in g

i

n

th

e c

ir c

ui

t

un

de

rr

es

on

an

ce

co

nd

it i

on

?

53

.

54

.

a)

7

12

1H

z

a

nd

16

7

A

b)

7

12

1 H

z

a

nd

16

7A

c)

71

2 1

H

z

a

nd

1

67

A

d

)

7

1

21

H

za

nd

1

67

A

T

hr

ee

eq

ua

li

m

pe

dan

ce

s

ar

e f

irs

t c

on

ne

cte

di

n

d

elt

a

ac

ro

ss

a

3 -p

ha

se

b

ala

nc

ed

su

pp

ly

.

f

he

sa

me

im

pe

da

nc

es

a

re

co

nn

ect

ed

in

s

tar

ac

ro

ss

th

e

sa

me

su

pp

lyt

he

n,

a)

P

ha

se c

ur

re

nt

w

il l

be

on

e-

th

ird

b

)

Lin

e

cu

rr

en

t w

il l

be

on

e-

th

ird

c)

P

o

w e

rc

on

su

m e

d

wi

ll b

e

on

e-t

h i

rd

d

)

P

ha

se

c

ur

re

nt

wil

l

rem

a

in

t

he

sa

m

e

A

H

ur

wi

tz

po

ly

no

m i

al

D

s)

m

us

ts

a t

is f

y

tw

o

co

nd

iti

on

s.

O n

ei

st

he

p

oly

no

m

ia l

is

r

ea

l wh

en

s

i

s

re

al.

W

h

at

is

th

e

oth

er

c

on

di

ti o

n?

a)

Ro

ot

s of

D

s)

h

ve

re

al

pa

rts

w

h

ich

a

re

po

sit

iv

e an

d

no

n-

zero

b

)

Ro

ot

s o

f

D

s

)

h

ve

im

a

gi

na

ry

p

ar

ts

w h

ic

h

ar

e n

ega

t i

ve

c)

Ro

ot

s of

D

s

) h

av

e

rea

l

pa

rts

w

hi

ch

a

re

ei t

he

rz

ero

or

n

eg

a t

ive

d)

R

oo

ts o

f

D

s) h

av

e

r

ea

l pa

rt

s

w h

ic

ha

re

p

o

siti

ve

o

r

z

ero

8-

DM

H

H

-N-

FF

A

8

-A

www.examrace.co


9/44

55.

T he unit

im

pulse

respon

se of a

sys te

m i s

58.

g

iven as

c t)

- 4

e-t + 6

e-2t. The

s te

p

respo

nse o

f the

same sy

s t em f

or t ;;

0 is

e

qual to

a)

3e-2t +

4e-t +1

b)

- 3e-2t

+

4e-t

+

1

c)

-

3e-2t+

4e-t -

1

d)

3e-2

t_ 4e-t

+

1

56.

Four am

meter

s M

1

,

M

2

, M

3

and

M

4

w

ithth

e

f

ollowin

g spec

ificatio

ns are

availa

ble. F

ull

scale

, accura

cy valu

e as pe

rcenta g

e of FS

)

57.

M 1

20 010; M 2

10

020; M

3

5

050;

andM

4

=1

100

A

cur

rent

of 1 A

is to b

e m eas

ured. T

o obta i

n

m

inim u

m error

in t

he rea

ding o

ne sho

uld

selec

t met

er

a)

M

1

b) M2

c) M

3

d)

M

4

n

a

ni

nductio

n

ty

pe

ene rgy

meter, the

st

eady

sp

eed at taine

d by

th

e

rotatin

g

d

isc is

1.

Pro

port ion

al to t

he deflec

ting tor

que.

2.

Pro

port ion

al to

t

he res

istance

of the

path o

f eddyc

urren ts

.

3.

Invers

e ly pro

port ion

al to

the effe

ctive

rea

dings

of discf

rom it

s axis.

4

Inve

rsely p

roportio

nal to

the

square o

f

brake

magn

et f

lux.

Which

of the

aboveare

corr

ect ?

a) 1

, 2

a

nd

3 only

b)

1, 2 an

d 4 only

c)

2, 3and

4 on

ly

d)

1, 2, 3

an

d 4

59.

60.

B

-DMHH

-N -FFA

9 -A

Co

nsiderth

e fo llo

wing fu

nctions

:

s

2

+

1 s

2

+

3)

1.

2

.

3.

4

W h

ich ofth

e ab ov

e func

tions are

LC d

riving

point

impeda

nces ?

a)

1, 2, 3

an

d 4

b) 2 and

3 onl

y

c)

1

a

nd2

only

d

) 3 a

nd 4 on

ly

A de v

ol tmete

r hasa

sensit

ivi ty o

f 1000Q/V.

W he

n it m

easures

halff

ull sca

le in 1

00 V

range,

the curren

t th

roughthe

volt

m e te ris

a) 1

00 mA

b)

50

mA

c)

1

mA

d)

0

5mA

T

wo

w

attme

ter

m ethod

is e

mploye

d to

m

easure

powerin

a 3-p

hase ba

lanced

sys tem

wi th th

e

cu

rrent

coil c

onnect

ed in th

e A and

C

lines.

The

phase se

quence

is AB

C. I

f

t

he

watt

meter with

its

cu

rrent

coil in

A -ph

ase

line

r eads z

ero, the

n the

power

factor

of the

3-ph

ase loa

d wil lb

e

a

)

Zero la

gging

b

)

Z

ero lead

ing

c

)

05lag

ging

d)

05

leadin

g

www.examrace.co


10/44

61. In

movi

ng ir o

n in s t r

um en ts

, eddy

curre

nt 65.

T he

cu r ren

t coil

of

a s

ingle-p

hase en

erg y

62 .

dam p

ing c

nnot

be

u se d as

m

eter is

wound

on

(a )

They h

ave a s

t rong o

peratin

g m ag

netic

field

(b)

They

are no

t norm al

ly used

in ver

tical

posi

tion

c

) The

y need

a large

d am pin

g force

, w hic h

can

only b

e provi

dedby

air frict

ion

(a)

O ne l

im bof th

e lam

ina ted

core

b)

Both the

lim b

s

of

the

lam

inated

core

w it

h sam e

num be

r of tu

rns

c)

Both the limbs

of the

lamina ted core

w i

th diffe

rentn u

m ber o

f turns

(d

) Th

e centr

e o f th e

l im b o

n the la

m ina te

d

(d)

The

introdu

ction

of a

perm

anent

cor

e

m

agnet

requ i

red fo

r eddy

c u rr

ent

dam pi

ng wo

uld d i

stor t the

exi

sting

66.

or cont

rolling

the vib

ration

of the d

isc o f a

c

w ea

k opera

ting m

agneti c

field

energ

y m ete r

, dam pi

ng torq

ue is pr

oduced

by

A basi c

D A rso

nval m

ovem e

nt show

in g full

s

cale de

flection

for a

cu rren

t of 50

LA a

nd

hav

ing i n t

e rna l r

esis tanc

e of 50

0 Q is u

sed as

a volt m

ete r.

What is

theva

lue of

m ultipl

ier

resis ta n

ce nee

ded to m

easu r

e a volt

age ra

nge 67

.

of0

-20V

?

(

a) 39

85 k Q

(b

) 39

9

k Q

c) 399

5 k Q

d

) 400

k Q

(

a) Ed

dy cur

rent

b) C

hem ic

al effec

t

c) E

le ctros

tatic ef

fect

(d) M ag netic effect

The

mete

r consta

nt of a

sin gle

-phase

230 V

indu

ction

wattho

ur met

er i

s

40

0 re vol

utions

p

er kW h. T

he spe

ed of th

e me

ter disc

for a

cu

r rent o

f 10 A

o

f 09p

flaggi

ng will b

e

(a)

1 38

0 rpm

b) 1

602rp

m

c) 1

820rp

m

63. O ne si n gle -p hase energy m e ter operating on

(d)

21-10 r

pm

64 .

2

30 V

and 5 A

for 5

hou

rs m ak

es 19

40 68.

revolu

tions. M

eter c

onstan

t is 40

0 rev/k

W h.

The

power f

actor of

theloa

d is

a) 10

b

)

08

c)

0

7

d

) 06

In De

Sauty

Bridge

(un mo

dified

form) it

is

po

ssible to

ob tain

bal anc

e

(a)

E ven

i

f both th

e ca

pacitor

s are

. i

m perfec

t

b)

f one

ofthe

ca

pacitor

s i lf per

fect

c)

Only

i f both th

e cap

acitors

are perf

ect

(d

) All

of the

a

bove

69 .

B-D

MHH-N

-FFA

10

-A )

A galvan

om ete r

has

a

cu rren

t sensit

ivity o

f

1 IJA/m

m

and a criti

cal dam

ping re

sistanc

e of

1 k Q

Th

e vol

tage s

ensitiv

ity

and the

me

g-ohm s

ensitiv

ity resp

ectively

a

re

(a)

1 m V/m

m

and 1

MQ

(b)

1 mV/m

m an

d 2 MQ

c) 2

mV/mm

a

nd

2 MQ

(d)

2 m

V/mm

and 1 MQ

Ele ctr ostatic volt m eters

are

particu larly

suit a

ble for

m easu

ring h ig

h volta

ges be

cause

the

constru

ction i

s simpl

ified du

e to

(a) L

arge e l

ectrost a

tic forc

es

(b)

Sm all e

lectro s

taticfor

ces

c)

Larg e

val ue

of curre

nt

(d)

S m a

ll valu

e of cur

rent

www.examrace.co


11/44

70

A moving coil instrument

of

resistance

5 Q 74

requires a potential difference

of

75 m V

to

give a

full

scale d ~ f l e c t i o n The value of

shunt resistance needed to give a

full

scale

deflection

at 30

A is

a) 25mQ

b)

999mQ

c) 5 Q

d) 995

Q

71 The function of input

attenuators

in

measuring instruments, like VTVM

and

CRO,

is to

a) Increase

the input

impedance

b)

Attenuate

the frequency

range

c)

Attenuate

the

input

signal amplitude

without altering

the

frequency contents

d)

Attenuate

the input impedance

72

With the help of which bridge

are

the

capacitance

and

dielectric loss of a capacitor

generally

measured

?

a) De

Santy

b) Wien series

c)

Anderson

d) Schering

75

76

A DVM uses 10 MHz clock

and

has a voltage

controlled generator which provides a width

of 5

j.LB/volt

of unit signal. 10 V

input

signal

would correspond to a pulse count of

a) 500

b)

750

c)

250

d) 1000

A resistance strain gauge

with

a gauge

factor of 20 is fastened to a steel

member

subjected to a stress of 100 N/mm

2

.

The

modulus of elasticity of steel is approximately

2 x 105 N/mm2. The percentage change in

resistance is

a) 1-50

b) 1-00

c) 015

d) 010

The

resistance

of

125

Q strain

gauge changes

by

1 Q

for

4000

micro-strain. The gauge factor

for strain gauge is

a) 15

b)

20

c) 25

d) 30

77 Delay line is essential

in

a CRO, to ensure

that

73 The

deflection of a

hot wire instrument

depends on

a) Instantaneous . value of alternating.

current

b)

Average value of current

c) RMS value of alternating current

d) Voltage instead of

current

B DMHH N FFA

11 -A )

a) Vertical signal

starts after

the retrace

period of sweep signal

b)

The

sweep reaches

the

horizontal

plates before the desired signal

under

consideration

c) Initial

part

of signal to be observed is

not lost

d) All

ofthe

above

www.examrace.co


12/44

I

78

Which of the following ADC

has

highest

81

The dominant poles of a servosystem

are

accuracy? located at s = 2 j2).

The

damping ratio of

a) Successive approximation type

b) Flash or parallel type

c)

Single slope integra tion type

d) Dual slope integration type

the system is

a) 1

b) 08

c) 0707

d) 06

82. For a unity feedback control with

79 Consider the following transducers :

1.

LVDT

2.

Piezoelectric

3.

Thermocouple

4. Photovoltaic cell

Which of the above

are

active transducers ?

G s) =

9

, the

damping ratio is

s s

+

3)

a) 05

b) 1

c)

0707

d) 033

a) 1, 2 and 3

b) 1, 2 and 4

83.

The overall transfer function of a second order

control system is given by,

c) 2

and

3 only

d) 2, 3 and 4

80

A

unity feedback second order control system

is characterized

by

the open loop

transfer

function s) = K

s Js

+B)

J = moment of inertia, B = damping constant 84.

and K = system gain

The

transient

response specification which is

not affected by system gain variation is

a) Peak overshoot

b)

Rise time

{c) Settling time

d) Time to peak overshoot

B-DMHH-N-FFA

12-

A

C s)

2

R s) s

2

+

3s

+

2

The time response of this system, when

subjected to a unit step response is

a) 1 -

e-

2t

+

2e-t

b)

1 + e-2t + 2e-t

c) 1 - 2e-t + e-2t

d)

1 + e-2t

The position

and

velocity

error

coefficients for

the system of transfer function,

G s)

= 50

1 + Ols) 1 + 2s)

are respectively

a) Zero

and

zero

b) Zero and infinity

c) 50 and zero

d) 50 and infinity

www.examrace.co


13/44


14/44

94 .

The st

ate equ

ations in

t

he ph ase

va riab

le 98 .

cano

nic al f

orm ca

n be

obtaine

d from

th

e

t

ransfer

fun

ction by

What

is the n

umber

of tu

rns of w

ire need

ed

to

p

rovide

a pote

ntiom et

er wit

h a reso

lu tion

of

005 pe

rcen t

(a)

C asca

de dec o

mpositi

on

b

) D

irect d

ec ompo

sition

c)

Inve rse dec omposi tion

(d)

a

rallel de

compos

ition

95.

The tra

nsfer

functio

n of a

zero o

rderhol

d is

given

b y

(a )

1

s

b

)

1-e

-T

c)

s 0 e-

T)

(d)

1

-T s

e

s

96. W

ith neg

ative f

eedback

, the s

ys tem

stabil i t

y

an

dsys

tem ga

in respe

cti vely

(a

) Inc

reases

andincr

eases

b)

Incre

ases and

decre

ases

c)

D ecre

ases a

nd incre

ases

(d)

Decreas

es an

d decreas

es

97

.

Output

In

put

T his no

n-linea

rity rep

resent

s

(a)

D e

ad zo n

e

b)

Co

ulomb

friction

c)

Sa

turatio

n

(d)

H

ysteres

is

a) 200

t

urns

b)

2000

tu rn

s

c)

20

turns

(d)

20000

tu rns

99.

C onside

r the f

ollowin

g prop

ert ies a

tt ribute

d

to state

model

of asy s

tem :

1.

State

m odel is unique.

2.

Tra

nsfer fu

nction

fo r th

e syst

em is

u

niq ue.

3.

State m o

del can

be

derive

d from

tr

ansfer

fu ncti

on of

the syste

m .

W hi

ch of th

e above

st

atemen

ts ar

e corre

ct ?

(a)

1, 2

an

d 3

(b)

1 and

2 only

c)

2 and 3

on ly

(d)

1 and 3

on ly

100

. Adisc

rete t

imesys t

em is s

tab le

i

f

all th

e roots

of

the char

acterist

ic equa

tion lie

(a)

O uts i

de the

circle

of uni

t radius

(b)

W it

h in t

he circle

of unit ra

d ius

(c

) O u

tside

the circ

le of

radius

equal

to

3-uni t

s

(d)

On

the circl

e ofnfi

nite r

adius

B-DM

HH-N -

FFA

14-

A

www.examrace.co


15/44

Directions : Each

of

the next twenty 20) items

104.

Statement W :

consists

of

two statements,

one

labelled as the

'Statement

W

and the other as 'Statement

(II)'.

Examine these two statements carefully and select

the answers

to

these items using the

codes

given

below:

Codes:

(a) Both

Statement

I)

and

Statement II) are

individually true and Statement (II) is the

coiTect explanation of Statement I)

b)

Both Statement I) and Statement I I) are

individually true but Statement (II) is

not

the

coiTect explanation of Statement (I)

c) Statement I) is

true

but Statement II) is

false

d)

Statement

(I) is false

but

Statement (II) is

true

101.

Statement W :

At 50 Hz the depth of penetration is 85 mm.

At

30 GHz the depth of penetration is

000038mm.

Statement (II) :

A high frequency field attenuates as it

penetrates conduction in a shorter distance

than

a low frequency field.

102.

Statement

( ) :.

A semi -conductor is

not

capable of sustaining

the

movement of free negative electrons,

but

capable of positive charges or holes.

Sta.tement

(II) :

The positive charges cannot be positrons

because to liberate the

latter, an

energy as

high

as

one million eV or more would

e

required.

103.

Statement W :

Hard

magnetic materials

are

used for making

permanent

magnets.

Statement

II)

:

Hard magnetic materials have relatively

small and naiTow hysteresis loop.

Servo motors have small diameter and large

axial length.

Statement

(II) :

Servo motors

must

have low

inertia and

high

starting

torque.

105.

Statement W :

The magnetic moments of diamagnetic

materials are mainly due to the orbital

angular momentum of the electrons.

Statement (II) :

A steady cuiTent flowing

in

the orbit produces

a magnetic field equivalent to that set up by a

dipole perpendicular to

the

plane of orbit

(Ampere s law).

106.

Statement

I)

:

Under

steady-state condition, a pure capacitor

behaves as an open circuit for direct voltage.

Statement

(II) :

The cUITent through a capacitor is

proportional to the

rate

of change of voltage.

107.

Statement

( ) :

During resonance,

an

R-1-C series circuit

behaves like a purely resistive circuit.

Statement

(II) :

During resonance in an R-L-C series circuit,

the voltages across the

1-

and the C-elements

are in phase to each other.

108. Statement W :

The simplest method of power measurement

is by means of electrodynamic type

wattmeters, having two fixed coils, and one

moving coil.

Statement

II)

:

Either of the fixed and the moving coils can be

used

as the

current or

the

voltage coils.

109.

Statement W :

A permanent magnet moving coil

instrument

is always slightly under damped.

Statement II) :

The pointer of the PMMC instrument should

overshoot a little beyond the steady-state

position to give the accurate reading.

B-DMHH-N-FFA

15- A)

www.examrace.co


16/44

110 Statement I) :

115 Statement I) :

Bridge measurements re considered to be

more aceurate

s

compared to measurements

done using indicating instruments.

Statement

a

In a bridge measurement the aceuracy of the

components used in

the

different rms of

the 116

bridge alone comes into picture.

111 Statement I):

RF voltage is measured by rectifying the

alternating voltage first nd then amplifying

the resul ting de output.

Statement ll) :

Amplification of RF signal itself is very

117

difficult.

112

Statement

I) :

Before making ny voltage measurement

using electronic voltmeter it is desirable to

short circuit

its

input nd make

zero-adjustment to ensure correct reading.

Statement

aiJ

Drift in the de amplifier of the electronic

voltmeter may indicate output without ny

input voltage present.

113 Statement l)

Platinum

re widely

measurements

applications.

Statement

11)

resistance

used for

for variety

thermometers

temper ture

of industrial

Platinum resistance thermometers provide

the highest

temper ture

sensitivity as

compared to

all

known temperature

transducers.

114 Statement I) :

118

119

Flash analog-to-digital conversion is

the

120

fastest but n expensive method for designing

ADCs.

Statement aiJ

Flash analog-to-digital converters

re

employed on very high speed digital

acquisition systems.

8 DMHH N FFA

( 16-

A

Transfer function approach is inadequate

when time domain solution is required.

Statement aiJ

All initial conditions of the system

re

neglected in derivation of transfer function.

Statement l)

The polar plot

h s

limitation for portraying

the frequency response of a system.

Statement a1J

The calculation of frequency response is

tedious nd does not indicate the effect of the

individual poles nd zeros.

Statement l) :

A large resonance pe k in frequency response

also corresponds to a large

pe k

overshoot in

tr nsient response.

Statement 11) :

All the systems which exhibit overshoot in

time response

will

also exhibit resonance peak

in frequency response.

Statement

l)

The st te feedback design is

th n conventional fixed

controller design.

Statement 11) :

more realistic

configuration

The disadvantage

with the

st te

feedback is

th t

all

the

states

must

be sensed nd fed

back for control.

Statement 1)

For r d r tracking systems signals re

available in the form

of

pulse trains.

Statement aiJ

The stability of a discrete-time system is

decreased as the sampling period is

shortened.

Statement

I)

Soft magnetic materials re not used in the

construction of perm nent magnets.

Statement II)

:

Soft magnetic materials have narrow

hysteresis loop low retentivity nd ow

coercivity.

www.examrace.co


17/44

SP CE FOR ROUGH WORK

B DMHH N FFA

17-A)

www.examrace.co


18/44

SP CE FOR ROUGH WORK

B-DMHH-N-FFA

18-

A

www.examrace.co


19/44


20/44

SP CE FOR ROUGH WOR

B-DMHH-N-FFA

20-

A

www.examrace.co


21/44


22/44


23/44

9.

As

su m

in g

a

u

nifo

rm

di

stri

buti

on of

CU

fen

t

o

ver

t

he

ar

mat

ure

s

urf a

ce

c

ond

uct

ors ,

th

e s

hap

e o

f t

he

resu

lta

nt

arm

at

ure

m.m

;f.

in

sp a

ce o

f a

lo a

ded

de

ma

chi

ne i

s a

sy m

me

tric

al

(a

)

Tria

ngu

la r

wa

ve

with

its

pe

ak a

lon

g

the inte r-p olar axis

b)

Tr

iang

ula

r. w

ave

wi

th i

ts p

eak

alo

ng

th e

po

le a

xis

.

(c)

R

ecta

ng

ula r

w

ave

wi

th

its

cen

tra l

ax

is c

oin

cidi

ng

wit

h th

e in

te r

-p o

lar

ax

iS

d)

R

ecta

ngu

la r

wa

ve

wit

h i

ts

cent

ral

ax i

s co

in c

idin

g w

ith

the

po

le a

xis

10

.

A

d

e s

eri

es

m o

tor

wit

h

a r

esi s

tanc

e

be

tw e

en

te r

min

als

o

f I

Q

r

uns

at

80

0 r

pm

fro

m

a. 2

00

V

su p

ply

tak

in g

15

A

.

f t

he

spe

ed

is t

o b

e re

duc

ed

to

4

75

rp m

fo

r th

e sa

me

su

pply

vo

ltag

e a

nd

cu

rre

nt t

he

add

ition

al

ser i

es r

esis

tan

ce t

o

be

inse

rte

d w

oul

d b

eap

pro

xim

ate

ly

a)

25

b)

3

(c

) 4

5

(d)

5

11

A

de

se r

ies

m o

tor

of

re

sist

anc

e I

ac

ro s

s te

rm

inal

s . r

uns

at

10

00

rpm

a

t

250

V

ta k

in g

a

curr

ent

of

20

A.

W

hen

a

n

add

itio

nal

re

sis

tanc

e

of 6

is

in

sert

ed

in

seri

es

and

ta

kin g

th

e s

am

e

curr

ent

; th

e n

ew

spe

ed

wo

uld be

(a)

1

428

rp

m

b)

16

67

r

pm

(

c) 4

78

3

rpm

(

d) 9

56

6

rp m

3

1

2.

D a

m pe

r bar

s

in

ca

se

of

Sa l

ient

. P

ole

R ot

ors

of

hy

dro -

alte

rn a

tors

ar

e u

sua

lly

i

nse

rte d

in

pol

e fa

ce s

to

(

a)

Str

eng

the

n th

e e

xci

tatio

n c

utT

en of

the

po

les

. b)

Damp out th e roto r oscillations

dur

in g

tr

ans

ient

s

tate

o

w in

g to

sudd

en

cha

nge

in

lo a

d c

ond

ition

s

(c

)

Hel

p i

m pr

ove

th

e p

ow e

r f

acto

r o

f

l

oad

(d)

R

edu

ce

th e

no

-lo

ad

cur

ren

t w

hen

lo

ad

is t

hro

wn-

off

13.

In synch ronous motor,

V

cu rves pres ent

th

e v

aria

tion

of

(

a)

.Ar

m at

ure

cu

rren

t

with

e

xcit

atio

n

(

fiel

d)

b)

Arm

atu

re

cur

re n

t w

ith

m

axim

um

p

ow

er d

ev e

lope

d

(c

) F

iel

d ex

cita

tion

w

ith

sta l

ling

tor

que

(d

)

Fiel

d

exc

itat

io n

w

ith

. m

inim

um

p

ow

er d

eve

lop e

d

1

4.

T

he

sy n

chr

ono

us

reac

ta n

ce

of


24/44


25/44

2

1

The

the

rm a

l a

nd

elec

tric

al e

ffic

ienc

ies o

f

a

I 00

M

W

stea

m

stati

on

are

res

pec t

ivel

y

3

0

an

d 9

2

. Th

e

co

al

use d

h

as

a

ca

lori

fic

val

ue o

f

64

00

kc

allk

g .

For

the

sup

ply

o

f

full

-loa

d r

ated

ca

pac

ity

the

c

oal

co

nsu

m p

tio n

in

k

g/h

ou

r

wou

ld

be

a

ppro

xim

ate

ly

(

a)

243

40

b

)

32

450

. (c)

4

869

0

d

)

649

10

22. Com pare d to turb ines in conventional

coa

l-fi

red

ther

ma

l sta

tio

ns,

nuc

lea r

po

wer

p

la n

t tu

rb i

nes

use

st

eam

at

(a)

Lo

w e

r p

ress

ure

an

d te

mp

era t

ure

b)

H

igh

er

pre

ssur

e a

nd

te m

per

atu r

e

(c

) L

ow

er

pre

ssu

re

and

h

ighe

r

tem

p

erat

ure

d)

H

igh

er

pre

ssu

re

an d

l

owe

r t

em

p

era t

ure

23

A

g

ene

rati

ng

st a

tion

h

as

50

0 MW

ma

xim

um

dem

an

d an

d a

nn u

al

load

fac

tor

of

5

0

, c

apa

city

fa

cto

r of

4

0 .

T

he

re

serv

e c

apa

city

of

th

e p

lant

is

(a)

125

MW

b)

6

25 M

W

(c

)

500

M

W

d)

7

25

M W

24

T h

e p

ow

er

tran

sm

iSSi

on

cap

abi

lity

of

.

bip

ola r

lin

es i

s ap

pro

xim

atel

y

(a

)

Hal

f th

at of

3

-ph

a.se

sin

gle

ci

rcui

t

li

ne

b)

Sam

e

as

th a

t of

3

-p h

ase

s

ingl

e

c ircu it line

(c

) T

wi

ce t

hat

o

f

3Cp

ha

sesi

ngl

e ci

rc u

it

li

ne

d

) T

hri

ce

that

o

f

3-p

has

e si

ng l

e ci

rc u

it

li

ne

2

5

T he

te

rm

'Sur

ge

Tan

k' i

s as

soc

iate

d w

ith

which type

of

pow erplant ?

(a)

Hi

gh

hea

d h

ydro

b)

L

ow

hea

d h

ydr

o

(c

)

M ed

iu m

he

ad

hyd

ro

(d

)

T he

rm

al

26

Eq

ual

are

a c

rite

ria

in

pow

er

sy s

te m

s is

use

d in

th

e c

ont

ext o

f

(a)

De

cid

ing

m a

xim

um

lo

adi

ng

fo r

a

giv

en e

xc i

tatio

n

b)

Sta

bilit

y of

a

m ac

hin

e c

onn

ecte

d t

o

i

nfin

ite

bus

ba

r

(c ) Stability

of

pow er sy stems in which

m

any

m

ach

in e

s a

re

con

ne c

ted .

to

infi

nite

bu

s ba

r

d

)

Loa

d d

istr

ib u

tion

be

tw e

en

a s

in g

le

m

ach

in e

a

nd

lo a

d.

dra

wn

fr

orn

inf

init

e bu

s b

ar

.

A - B

DM

H

HN

F

FB

www.examrace.co


26/44


27/44

33 Co

nsi

der

the

fo l

lo w

ing

sta

te m

ents

:

T h

e i

ntr i

nsic

can

ier

c

onc

entr

a ti o

n

of

a

sem

ico

ndu

cto

r

1

. D

epe

nds

on

do

pin

g

2.

Inc

reas

es

ex

pon

ent

ia lly

w

th

d

e

c

rea

se o

f

b an

d

gap

of th

e s

em i

c

ond

uct

or

3.

Inc

re as

es

non

-lin

earl

y w

ith

inc

reas

e

o

f

t

em p

era

ture

. 4.

Inc

reas

es

line

a rl

y w

ith

inc

rea

se

of

t

em p

era

tur

e

W

hic

ho f

.the

ab

ov

e

s

ta te

m e

n ts

ar

e

c

orre

ct?

(a

)

I, 2

an

d 3

(b

)

I

and

2

only

(c)

2

and

3

onl

y

(d)

2 an

d

4

onl

y

34

. T

he

co

ncen

tr a

ti on

ofm

ino

rity

ca

rri e

rs

in

an

e

xtr i

nsic

s

em

icon

du c

tor

u

nde

r

equ

ilib

riu m

is

(a)

D

irec

tly

p

ropo

rti

ona

l

to

d

op

ing

con

cen

tra t

ion

(b

)

D i

rect

ly

pro

por

ti on

al

to

intr

insi

c

onc

ent

ia ti

on

(c

)

I

nve

rsel

y

pro

por

tion

al

to

do

pin g

co

nce

ntr

atio

n

(d)

In

ver

sely

pr

opo

rti o

nal

to in

lli n

sic

con

cen

trat

io n

7

35 T h

e C

E

shor

t ci

rcu

it cu

rre

nt g

ain

,

{ o

f

a

tran

sis

to r

(a

)

is a

m o

no

to ni

cail

y i

ncre

asi

ng

fu nc

t

io n o

f

th e

col

lect

or

curr

ent

,

l

(b

)

is

a

m

on

oto n

ica

ll y

d

ecre

asi

ng

fm1ction

of

l

(c)

fo

r l

ow

va

lu es

of

it

in

crea

ses

a

nd r

each

es

a m

ax

im u

m

and

th

en

de

crea

ses

w

ith

f

urt h

er

in c

rea

se

in

c

(d)

is

no

t a

fun

ctio

n of

l

3

6. F

o r

for

war

d b

ia se

d d

iod

e

a)

Tra nsition capacit ance is larg er than

d i

ffus

ion

cap

aci

tan

ce

(

b)

D

if f

usio

n c

apa

cit a

nce

is

larg

er

th an

tr

ans

it io n

ca

pac

itan

ce

(c

)

B ot

h c

apa

cit a

nce

s ar

e h

av i

n g

sam

e

v

alue

(

d)

Ca

nno

t pr

edi

ct w

ith

cer

tain

ty

3 7

. C

o ns

ider the. follow ing steps in th e

fa

bri c

atio

n

of

a

m o

nol

it hic

b i

po l

ar j

u n c

tion

ll'a

nsis

tor

:

1

E

m it

ter

diff

usio

n

2.

Bas

e d

iffu

sion

: Bu

ri ed

la y

er

fo rm

ati

on

4

. B

pi-l

ay er

for

mat

ion

W h at

is

the correct sequence

of

th ese

st

eps

?

(a)

I,

2,

3

and

4

(b)

4,

2 ,

3 and

1

(

c)

1

3,

2 an

d 4

(

d)

4,

3

2 a

nd

1

A

-

B D

M

HH

N

FF

B

www.examrace.co


28/44

38

.

In a

p

11

ju

nc

tion

d

io

de

un

de

r r

ev

ers

e

b

ias

, t

he

m

agn

itu

de

o

e

lec

tric

f

iel

d i

s

ma

xim

um

a

t

a

)

Th

e e

dg

eo

t

he

de

ple

tio

n r

egi

on

on

th

e

s

ide

b)

T

he

ed

ge

o

th

e d

ep

leti

on

re

gio

n o

n

t

he

n

sid

e

c)

T

he p

n

ju

nc

tio

n

d

)

T

he

c

en t

re

o

th

e d

ep

let

ion

re

gio

n

on

th

e

s

ide

3

9.

Co

ns

id e

r

th

e

f

ollo

w

ing

sta

tem

e

nts

re

ga

rdi

ng

a d

iff

ere

nti

al

am

plif

ier

us

ing

an

. P

ET

p

air

. T

he

d

iffe

ren

tia

l o

ut

put

o

ffse

t

vo

ltag

e

is

due

to

:

1

.

M

ism

at

ch

be

tw e

en

P

ET

pa

ram

e

ter

s

2.

Dif

fer

en

ce

be

tw

een

t

he

va

lue

s

o

resisto rs used

in

the circu it even

th

ou

gh

th

ey

are

m

ar

ked

n

om

in

ally

eq

ual

3.

Va

ria

tio

n

in t

he

op

era

ting

v

olt

age

o

th

e

cir

cui

t

W

hi

ch

o

the

a

bo

ve

s

tat

em

ent

s

are

c

or

rec

t?

a

)

I,

2

an

d 3

b)

2 a

nd

3

on

ly

c)

I

a

nd

3

onl

y

d)

I

an

d

2 o

nly

8

DM

H

H

NFFB

A

8

4

0

As

com

p

are

d

to

an

LE

D

, a

n L

C

D

has

t

he

dis

tin

ct

ad

van

tag

eo

a)

E

xt

rem

ely

low

po

we

r c

on

sum

p

tion

b

)

Pro

vid

in

g a

si

lve

r d

isp

lay

c

)

Be

ing

e

xtre

m

ely

th

in

d)

G

ivin

g

tW

o t

ype

so

dis

pla

ys

41

W

he

n.

a

tr

an

sist

or

i

s

co

nne

cte

d

m

c

om

mo

n

em

itte

r m

o

de

it

wil

l h

av

e

.

a)

.N

eg

lig

ible

in

pu

t r

esi

sta

nce

an

d

hig

h

out

pu

t re

sis

tan

ce

b

)

Hi

gh

i

np

ut

re

sis

tan

ce

an

d

l

ow

o

utp

ut

res

ist

anc

e

c)

Me

diu

m

in

pu

t r

esi

sta

nce

a

nd

hi

gh

ou

tpu

t r

esi

sta

nce

d

)

L

ow

i

np

ut

re

sist

an

ce

a

s w

el

l

as

o

utp

ut

res

ist

anc

e

4

2

The bandwidth

o

an

RC-coupled

am

pli

fier

is

lim

it

ed

by

a

)

Co

up

lin

g

ca

pa

ci to

rs

a

t

the

l

ow

f

req

uen

cy

e

nd

an

d

by

pas

s

cap

ac

i

tor

s a

t t

he

hig

h

fre

qu

enc

y

end

b)

C

oup

lin

g

ca

pa

cit

ors

a

t

the

h

ig

h

f

req

ue

ncy

e

nd

an

d

by

pa

ss

ca

pac

i

tor

s a

t t

he

lo

w

fre

que

nc

y

en

d

c) and coupling capacitors at

t

he

lo

w

fre

qu

enc

y

en

d an

d

.d

evi

ce

sh

un

t

ca

pac

ito

rs

. a

t

th

e

h

igh

fr

eq

uen

cy

e

nd

d)

De

vic

e

shu

nt

ca

pac

ito

rs

at

th

e l

ow

f

req

uen

cy

e

nd

an

d

by

pas

s

as

we

ll

as

cou

pl

ing

ca

pa

cit

ors

a

t th

e

hig

h

fre

qu

en

cy

en

d

www.examrace.co


29/44

43. Which one of .the following systems

gives the highest figure-of-merit a

measure of the noise performance)?

(a) WBFM

b)

NBFM

(c)

M

(d)

SSB

44 The increase in value

of

{

of

transistor

can cause the fixed bias circuit to

(a) Shift from saturation regton to

active region

(b) Shift the operation from active

mode

to

saturation mode

(c) Shift the operation from saturation

mode to

C)Jtoff

mode

d)

Shift the operation from cutoff

mode to active mode

45. The gain and distortion of an amplifier

are respectively

150

and

5 .

When used

with a I0 negative feedback the

distortion would be

(a) 5/16

b) 9/16

(c) 6

(d) 8

9

46. A two stage amplifier with negative

feedback

47.

(a) can become unstable for iarger

values

of

{

(b) becomes unstable at high and very

low frequencies

if

A

is

ve1;Y

large

(c) becomes unstable 'when the pole

frequencies become complex

(d)

is

always stable

In case of amplifiers, which

coupling

gives the highest gain ?

(a) Transformer coupling

(b)

Resistance coupling

(c) Impedance coupling

(d)

Capacitance coupling

48. Active load is plimarily used in the

collector of the differential amplifier of

an OPAMP

(a) To

increase the output resistance

(b)

To

increase the differential gain A

(c) To handle large signals

(d) To provide symmetry

49. The pulse width out of a one shot multi

vibrator increases when the

(a) . Supply voltage increases

(b) Timing resistor decreases

(c) UTP decreases

d) , Timing capacitance. increases

A - B DMHH N FFB

www.examrace.co


30/44

50

In

a d

e m

ac

hin e

, f

or t

he

sam

e n

um

ber

of s

lots

a

nd

sa

m e

cu

rre

nt

in

th

e

ar

m a

ture

co

ndu

cto

r,

whi

ch

one

of th

e

f

ollo

win

g w

ill

ind

uc e

hig

her

e

mf

?

a)

L

ap

win

din g

(b

) W

av

e w

in d

in g

c

) C

om

pe

nsat

in g

win

din

g

d

) P

ole

wi

ndi

ng

5

1.

If

the

out

put

o

fa lo

gic

gat

e is

1

w

hen

all its inputs are at logic

0,

th e gate is

eith

er

a)

A

N

A N

D

or

a

N

O R

(b

)

A

n A

N D

or

a

n E

X -N

O R

c)

An

O

R

or

a

NA

N

D .

d)

An

E X

-O

R

or

a

n E

X -

N O

R

52

. C

ons

id e

r th

e fo

llow

ing

ex

pre

ssio

ns :

I

=I

A,

B,

C

, D

)=

:E

I, 2

, 4

,

7,

8

,

1

1,

13,

1

4)

2

.

Y =

f

A,

B,

C,

D

=

:E

3, 5,

7

, 10

,

11,

12

,

13, 1

4

3.

y

I

A

, B,

C

, D

) =

IT

(O,

3

5, 6,

9,

10,

12

, 1

5)

4.

y

I

A, B

,

C

,

D

)

=

I

T(O,

I,

2,

4,

6

,

8, 9,

15

)

B D

M

HH

N

FF

B

A

1

W h

ic h

of th

ese

ex

pres

sio

ns

are

eq

m

va

le n

ts

of

th

e e

xpr

essi

on

Y=

AE

fJB

Efi

CE

' D

?

a)

I

an

d 2

(b

)

1 an

d 4

c)

,2 a

nd

3

d)

I a

nd

3

53

. M

ult

ip le

xin

g

sch

em

ew h

ich

use

s c

arri

er

p

has

e sh

ifti

ng a

nd

syn

chr

on.o

us detection

to p

erm

it

two

DS

B s

ig n

als

to o

cc u

py

the

sa

m e

fre q

uen

cy

ban

d i

s c

alle

d

a)

N

BF

M

(b)

CD

M A

c)

Q A

M

d)

FD

M

54

. In

a 5

x 7

do

t m

atr

ix f

orm

at

a)

64

bi

ts

are

req

uir

ed

to

st o

re

64

a

lp ha

num

eri

c c

hara

cte

rs

(

b)

56 0

bi

ts a

re

req

uir e

d

to s

to r

e 6

4

al

pha

num

er ic

ch

ara

cter

s

c)

112

0 b

its

are

re

quir

ed

to

stor

e 6

4

al

pha

num

eri

c ch

ara

cter

s

d

) 2

240

b

its

are

req

uir e

d t

o s

to re

64

alp

han

um

eric

ch

ara c

te rs

www.examrace.co


31/44

55

. Rea

dy pin.

o mic

roproc

essor is

used

a)

To in

dicate

that m

icropro

cessor

is

ready t

rece

ive inp

uts

b

) To ind

icate t

hat mi

cropro

cessor

is

r

eady to

receiv

e ou tp

uts

c)

To int

roduce

wait s

tate

d) To p

rovide

direct

mem or

y acce

ss

56.

A bu

s conn

ected b

etween

the C

PU an

d

the mai

n mem

ory tha

t permi

ts trans

fer o

inf

ormatio

n betw

een m

ain me

mory

and

the C

PU is

kn own

as

a) DMAbus

b

) Mem o

ry bus

c)

. Addr

ess bus

d) Con

trol bu

s

57

A mic

roproc

essor i

s desig

ned to

access

2

k ROM

, 4 k

PROM

an d 6

4 k R

AM.

The

nuinb

er o a

ddress

lines r

equired

t

o

acces

s these

mem

ories b

y the lP

is

(a )

16

b)

17

(c) 18

d) 19

58.

Consider the following statements :

L

SRAM

is

mad

e up

o flip

flops

2.

SRAM

stores

bit as

voltag

e

3

. D

RAM

has h

igh sp

eedan

d low

den

sity

4.

DRA

M is

cheape

r than

SRAM

Which

o th

e abo

ve sta

tement

s are

c

orrect?

a) I

, 2 and

3

b) I, 3

and 4

c)

2

3

and 4

d) I,

2 and

4

59.

In ord

er to g

enerat

e co nt i

nuous

square

w

ave u

sing 8

254 ti

mer, i

t m us

t be

pro

gramme

d in

a) mo

de 0

b

) mode

c) mo

de 2

d

) mode

3

60

. The

operat

ions ex

ecuted

by tw)

or mo

re

contr

ol units

are re

ferred

as

a)

Micr

o-opera

tions

b) M

acro-op

eration

s

c)

Multi-

operati

ons

d) Bi

contro

l-opera

tions

61. W

ith ref

erence

to 808

5 micr

oproce

ssor,

whic

h o t

he fol

lowing

statem

ents a

re

correct

?

INR is

1-byte

instru

ction

2. OUT

is.

2-b

yte ins

truction

3

. STA

is 3-

byte in

structio

n

a) 1

and 2

only

b)

2 an

d 3 on

ly

(c)

I and

3 only

d) 1

, 2 a

nd 3

A - B D

M H H

N FFB

www.examrace.co


32/44

62.

Co

nsider t

he foll

owing

registe r

s :

1.

A ccum

ulator

and fl

ag reg i

ster

2.

B

an

d C re

giste rs

3.

D an d E

regi

sters

4.

H and

L regi

sters

W hi

c h of

these 8

-bit re

gisters

of 80

85

lP

c

an be

pai red

togeth

er to m

ake a

16 -bit

registe

r ?

a) I,

3 and

4

b) 2

, 3 an

d 4

c) I

, 2 an

d 3

d) I, 2

an

d 4

63.

The

first m

icropr

ocessor

to i

nclude

virtual

m em

ory in

the

Intel

micro

process

or fam

ily is

a) 80

286

b) 80

386

c) 8

0486

d)

Penti u

m

6

4. In 8

085 m

icropro

cessor,

w hich

m ode

of

add

ressing

does t

he inst

ruction

CMP

M .

us

e

a)

D ir ec

t addre

ssing

b)

Reg

ister a

ddressi n

g

c) .In

direct

address

ing

d)

Im m ed

iate ad d

ressin g

B D

M H H

N FFB

A

12

6 5 . W

hich

of th e f

ollow in

g 80 85

in stru

ction

w

ill re

q mre

m a x m m

m T

-states

for

ex

ecu tion

?

a)

X

RI

byte

b)

STA a

ddress

c)

C A L L

addres

s

d)

JM P a

ddress

66.

ow

m any m

achin

e cycle

s are r

equiret

l

b

y ST A

instru

ct ion?

a)

2

b) 3

c) 4

d) 5

67 . W

hich

of the

follo

wing

instruct

ions

IS

close

st m a

tch to

the

instruc

tion

P O P

PC

a) RE

T

(b)

PCI-IL

c)

P O P

PSW

d

) D A

D SP

68. L

O A D E

R is a

p rogr

am tha

t

a) Lo

ads th

e m nem

onics

and gen

erates

a h

ex file

b) Lo

ads th

e hex

file and

conve

rts to

the

, execu

table fil

c) Lo

ads th

e CO M

file a

nd gen

erates

th

e binar

y code

d) L

oads E

nglish

like c

o m m a

nd and

generat

es the

binary.

co d e

www.examrace.co


33/44

69

. D

ire c

t-M

em

ory

Ac

ces

s ch

ann

el

DM

A

)

fac

ilita

tes

dat

a to

m o

ve

in a

nd

out

o

f

the

sys t

em

a)

On

fi r

st-c

om

e fi

rst-

serv

e b

asis

b)

W ith equal .time delay

c)

W i

thou

t a

sub

-ro

utin

e

d)

W

ith

out

pro

gra

mm

e i

nter

ven

tion

70

T

he

add

re s

s li

nes

A

15

to

A o

f

a m

ic r

o

p

roce

ss o

r w

ith

64

K

m e

m o

ry

cap

acit

y

are

co

nne

cte

d to

th

e c

hip

sel

ect

line

of

a 5

12

x

8

E

PR O

M

th

ro u

gh

an

AN

D

gate. Its mem ory m ap ranges from

0000

to

a)

O

OFF

b)

03

FF

c

)

02F

F

d

)

01F

F

71

A

d

evi

ce

or

a

per

ip h

eral

e

quip

m e

nt

. w

hic

h i

s n

ot

in

dir e

ct

com

m u

nic

ati o

n

wi

th C

PU

of

a

com

pu

ter

is c

alle

d

a) O

ff

li

ne d

ev i

ce

b

) O

n

line

de

vic e

c)

A

ctiv

e d

evic

e

d)

Slow dev ice

72

. T

hre

e d

evi

ces

A,

Documents

IES Electrical Engineering Objective Paper 2014