Physics MCQs

Page No. 6

The electronic circuits which implement the various logic operations are called_____________?


aLogic gates

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bBoolean algebra

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cAmplifier gain

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dLogic functions

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View Answer Logic gates

In forward bias the width of potential barrier_____________?


a Increases

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bDecreases

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cRemains same

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dNo effect

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View Answer Decreases

In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?


aEqual to D.C. value

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bMore than D.C. value

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cLess than D.C. value

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dZero

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View Answer More than D.C. value

To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?


a2

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b3

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c4

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d5

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View Answer 3

The working of transistor as amplifier is similar to________________?


aStep up transformer

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bStep down transformer

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cThree diodes in common

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d Triode vacuum tube

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View Answer Triode vacuum tube

An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?


aNon-inverting voltage at output

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bReference voltage on the other

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cVirtual input

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dOutput

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Non-inverting amplifier circuits have____________?


aA very high input impedance

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bA very low input impedance

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cA low output impedance

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dNone of the above

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The operation of a transistor requires______________?


aThat the emitter be heated

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bThat the base be heated

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cThat the collector be heated

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dNone of the above

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View Answer None of the above

To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?


a2

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b 3

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c4

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d5

✓


View Answer 5

The operational amplifier is______________?


aA high gain amplifier

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bA high-power amplifier

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cA high resistance amplifier

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dA low resistance amplifier

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View Answer A high gain amplifier

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