Electrical Engineering MCQs

Page No. 138

In an LC transistor oscillator, the active device is___________?


aLC tank circuit


bBiasing circuit


cTransistor


d None of the above


View Answer Transistor

An oscillator employs___________feedback?


aPositive


bNegative


cNeither positive nor negative


dData insufficient


View Answer Positive

In a phase shift oscillator, we use____________RC sections?


aTwo


b Three


cFour


dNone of the above


View Answer Three

The application where one would most likely find a crystal oscillator is____________?


aRadio receiver


bRadio transmitter


cAF sweep generator


d None of the above


View Answer Radio transmitter

In a certain oscillator Av = 50. The attention of the feedback circuit must be___________?


a1


b 01


c10


d02


View Answer 02

____________is a fixed frequency oscillator?


aPhase-shift oscillator


bHartely-oscillator


cColpitt’s oscillator


dCrystal oscillator


View Answer Crystal oscillator

An important limitation of a crystal oscillator is____________?


aIts low output


bIts high Q


cLess availability of quartz crystal


dIts high output


View Answer Its low output

The value of negative feedback fraction is always _______________?


a Less than 1


bMore than 1


c Equal to 1


d None of the above


View Answer Less than 1

The Q of the crystal is of the order of____________?


a100


b1000


c50


d More than 10,000


View Answer More than 10,000

When negative voltage feedback is applied to an amplifier, its voltage gain ____________?


aIs increased


bIs reduced


cRemains the same


dNone of the above


View Answer Is reduced

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