Electrical Engineering MCQs

Page No. 137

In a transistor ______________?


aIC = IE + IB


b IB = IC + IE


c IE = IC – IB


dIE = IC + IB


View Answer IE = IC + IB

Most of the majority carriers from the emitter____________?


a recombine in the base


b recombine in the emitter


cpass through the base region to the collector


dnone of the above



In a transistor, the base current is about_________of emitter current?


a25%


b20%


c35 %


d5%


View Answer 5%

A transistor is a___________operated device?


a current


b voltage


cboth voltage and current


d none of the above


View Answer current

A transistor has____________?


a one pn junction


btwo pn junctions


cthree pn junctions


dfour pn junctions


View Answer two pn junctions

If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is_____________?


a10


b1


c01


d15


View Answer 01

The element that has the biggest size in a transistor is____________?


acollector


bbase


cemitter


dcollector-base-junction


View Answer collector

An oscillator produces___________oscillations?


aDamped


bUndamped


cModulated


dNone of the above


View Answer Undamped

If the crystal frequency changes with temperature, we say that crystal has___________temperature coefficient?


aPositive


bZero


cNegative


d None of the above


View Answer Positive

An LC oscillator cannot be used to produce ____________frequencies?


aHigh


bAudio


cVery low


dVery high


View Answer Very low

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