Electrical Engineering MCQs

Page No. 137

In a transistor ______________?


aIC = IE + IB

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b IB = IC + IE

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c IE = IC – IB

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dIE = IC + IB

✓


View Answer IE = IC + IB

Most of the majority carriers from the emitter____________?


a recombine in the base

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b recombine in the emitter

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cpass through the base region to the collector

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dnone of the above

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


a25%

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b20%

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c35 %

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d5%

✓


View Answer 5%

A transistor is a___________operated device?


a current

✓


b voltage

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cboth voltage and current

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d none of the above

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View Answer current

A transistor has____________?


a one pn junction

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btwo pn junctions

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cthree pn junctions

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dfour pn junctions

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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

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b1

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c01

✓


d15

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View Answer 01

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


acollector

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bbase

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cemitter

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dcollector-base-junction

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View Answer collector

An oscillator produces___________oscillations?


aDamped

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bUndamped

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cModulated

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dNone of the above

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View Answer Undamped

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


aPositive

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bZero

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cNegative

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d None of the above

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View Answer Positive

An LC oscillator cannot be used to produce ____________frequencies?


aHigh

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bAudio

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cVery low

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dVery high

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View Answer Very low

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