Electrical Engineering MCQs

Page No. 25

The maximum collector efficiency of class B operation is ________________?


a50%

✖


b 90%

✖


c5%

✖


d5%

✓


View Answer 5%

If a transistor is operated in such a way that output current flows for 60o of the input signal, then it is ______________ operation?


aClass A

✖


bClass B

✖


cClass C

✓


dNone of the above

✖


View Answer Class C

A class A power amplifier is sometimes called______________amplifier?


aSymmetrical

✖


bSingle-ended

✓


cReciprocating

✖


dDifferential

✖


View Answer Single-ended

A 2-transistor class B power amplifier is commonly called ______________ amplifier?


aDual

✖


bPush-pull

✓


cSymmetrical

✖


dDifferential

✖


View Answer Push-pull amplifier

A power amplifier has comparatively __________________ ß ?


aSmall

✓


bLarge

✖


cVery large

✖


dNone of the above

✖


View Answer Small

Low efficiency of a power amplifier results in_________________?


aLow forward bias

✖


bLess battery consumption

✖


cMore battery consumption

✓


d None of the above

✖



When a transistor is cut off _________________?


aMaximum voltage appears across transistor

✓


bMaximum current flows

✖


cMaximum voltage appears across load

✖


dNone of the above

✖



If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least___________________?


a5 W

✖


b 33 W

✖


c75 W

✖


d1 W

✓


View Answer 1 W

The output stage of a multistage amplifier usually employs______________?


aPush-pull amplifier

✓


bPreamplifier

✖


cClass A power amplifier

✖


dNone of the above

✖


View Answer Push-pull amplifier

The size of a power transistor is made considerably large to________________?


aProvide easy handling

✖


bDissipate heat

✓


cFacilitate connections

✖


d None of the above

✖


View Answer Dissipate heat

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