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ELECTRON DEVICES AND CIRCUITS

PUZZLES :

1.Choose the Symbol of PN junction diode:-

A. B. C.

2.PN junction diode acts as ----------------?

CLUE: Rectifiers

3.When the negative terminal is connected to positive terminal and when the positive terminal is connected to negative terminal then it is called as----------- bias

CLUE :

4.Diode acts As a -----------

CLUE :

5.Conversion of

Is called as ----------

S.Saranya AP/ECE SNS college of ENgineeringPage 1

6.Type of the Diode

7.The ratio of rms value of Ac component to Dc component in the output is called as

A. B C.

8.


9.The need for a center tapped transformer in Full wave rectifier is eliminated in -------

CLUE:

10. Peak factor of half wave rectifier is

A. B. C.

11.Find the odd man out

a. Inductor filter b. capacitor filter c. Rc filter

12.which works under the phenomena of electroluminescence

CLUE:

13.


14.

15.Identify the characteristics of the figure:

16.Threshold voltage for germanium

A. B. C.


17.In order to make distortion free circuit and to the transistor to work in active region desired que point .What it means?

18. Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.

A. True B.False

19.-------- through takes place at a fixed voltage between collector and base and is not dependent on circuit configuration

CLUE:


20. 2) BJT-terminal Function

Across1. ACTS AS AMPLIFIERDown1. ACTS AS BUFFER21.

22.Multiplication Factor Is Denoted By?

A. B. C. D.

23.


24.Reverse saturation current --------for every 10 degree increase in temperature????

Clue:

25. FIND THE WORDS BELOW:

26.Identify the symbol:

27.Expand CCD


28.Expand?

29.Match The Following:

a.GTO--------light activated scr

b.TRIAC-----gate turn off

c.LASCR-----triode A.C switch

30.Range Of Intrinsic Stand Off Ratio???

A. B. C.

31.

32.A portion of input signal without distorting the remaining part of alternative waveforms is

STARTS WITH ends with


0.56 to .75 2.555 to4.66 2.66 to 3.77

33.

34.-------- Shifts a signal to different DC levels

CLUE:


35.

36.Which circuit is astable multivibrators?

a. b.

37. ZENER DIODE AS A REGULATOR


ACROSS:2. Two types of regulation are----------(2)regulation and load regulationDOWN:1. Maximum current will flow through the zener diode during -------------------(1)3.The purpose of a ................is to maintain a constant voltage across a load regardless of variations in the applied input voltage and variations in the load current.(3)

38.-------- multivibrator is used as memory element in Shift register

--------------------------------

39. ZENER DIODE CHARACTERISTICS

Decrypt the encrypted term.

Clue: This mechanism is caused because of acceleration of charges due to large electric field in the depletion region which further collides with the atoms in the silicon lattice causing dislodging of atoms.

40.Among the configuration which one is the best

CLUE:


41.Transistor has -------- types of configuration

A. B. C.

42.Find the below word

43.Transistor acts as a ---------------------


44.Common base has a current gain of

a b. c.

45.

46


47.Find the words

48.Expand IGBT

49.Find the odd man out

a. CE configuration b. CC configuration c. ZC configuration

50.Common emitter is ------------- doped

CLUE:


51) When a snowball rolls down a snowy hill, it picks up snow, which causes it to roll faster. The result is that the snowball will pick up more snow and roll even faster. This scenario would best be described as:

a)

b)

52) The audio amplifier response curve illustrated in Fig. 3shows which of the following problems?

a) Frequency distortionb) Amplitude distortion


53) At what phase shift is the magnitude of βA at its maximum in the Nyquist plot?

54) The most commonly used semiconductor material is


55) In which of these is reverse recovery time nearly zero?

56) The number of doped regions in PIN diode is

57) Which of the following is used for generating time varying waveforms


58) The unit of trans conductance is

59) The voltage at which avalanche occurs is

Clue:


60) In a bipolar transistor the base collector junction has-------------bias

Clue:

a) b)

61) Free electrons exist in---------band

Clue:

62) The figure represents a --------


63)

64)

65)


66) Find the following word

67) Encircle the words

68) Measure of the ability of the circuit to increase the power or amplitude

is _________


Clue:

69) _________ amplifier is a two port network constructed from a series of

amplifiers

Clue:

70) The BJT is a ________ controlled device

Clue:

71) Find the following words


AIGN

SACDCEA

__ U__ __ E __ T

72) _________ amplifier is a dc coupled high gain electronic voltage amplifier with a differential input

Clue:

73)


__ P __ R __ __ I O__ A __

74)

75) Find the words:


76)

77)


78) Crossword puzzle:

79)


80)

81)

82)


83) ________ Mega ohm is the typical value for the input impedance Zi for JFETs?

84) MOSFET digital switching is used to produce which digital gates

Clue:

(Opposite output) gates

(Complementary of addition) gate

(Multiplier) gate

85) For a common-emitter amplifier, the purpose of the emitter bypass capacitor is

to ___________ ___________ gain

clue:


__ __ O __ S __ N __

86) The total voltage gain of a multistage amplifier is the product of the individual stage gains.

Ans: True/false

87) When transistors are used in digital circuits they usually operate in the saturation and _______ region

Clue:

88) If the input to a comparator is a sine wave, the output is a

Clue:

89) Isolating a problem in a circuit is called as


90) Form the word:

91) An instrument or a circuit consisting of four resistors or their equivalent in a series-parallel arrangement, used to determine the value of an unknown resistance when the other three resistances are known.

92) The difference in potential between two points caused by current flow through a component.


__ L __ __ T __ __ M __ T __ __ E

F __ __ C __

93) A broad classification of semiconductor devices used as electronic switches. Examples include diacs, SCRs, and triacs.

94) Electromechanical device that use electromagnetism to produce a mechanical operation.

Clue:

95) A group of eight binary bits, commonly used to represent digital data.

Clue:

96) A cylindrical arrangement of insulated metal bars connected to the armature coils of a direct-current electric motor or generator, providing a unidirectional current from the generator or a reversal of current into the coils of the motor.


T __ Y __ __ S __ O __

97) _______ law of electromagnetic induction which states that an induced voltage will have a polarity that opposes the current change that produced it.

98) What is the resistor value in the given circuit?

a) 1 k ohmb) 2 k ohmc) 3 k ohmd) 4 k ohm

99) What does a Hall Effect sensor sense?


100) Which is the DIAC?

a)

b)

c)

d)


TEMPERATURE

PRESSURE

MAGNETIC FIELD

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