Electrical Engineering MCQs

Page No. 134

At the base-emitter junctions of a transistor, one finds___________?


aa reverse bias

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b a wide depletion layer

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clow resistance

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dnone of the above

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View Answer low resistance

In a transistor if ß = 100 and collector current is 10 mA, then IE is___________?


a100 mA

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b 100.1 mA

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c110 mA

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dnone of the above

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View Answer 100.1 mA

The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is___________?


a0o

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b180o

✓


c90o

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d270o

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View Answer 180o

The phase difference between the input and output voltages of a transistor connected in common collector arrangement is_____________?


a1800

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b 00

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c900

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d2700

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View Answer 00

When voltage feedback (negative) is applied to an amplifier, its input impedance _______________?


a Is decreased

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bIs increased

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cRemains the same

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d None of the above

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View Answer Is increased

Emitter follower is used for________________?


aCurrent gain

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bImpedance matching

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cVoltage gain

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d None of the above

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View Answer Impedance matching

When a negative voltage feedback is applied to an amplifier, its bandwidth_____________?


a Is increased

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b Is decreased

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cRemains the same

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d Insufficient data

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View Answer Is increased

The arrow in the symbol of a transistor indicates the direction of____________?


aelectron current in the emitter

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belectron current in the collector

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chole current in the emitter

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ddonor ion current

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Emitter follower is a _______________circuit?


aVoltage feedback

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bCurrent feedback

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cBoth voltage and current feedback

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dNone of the above

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View Answer Voltage feedback

An emitter follower has ______________input impedance?


aZero

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bLow

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cHigh

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dNone of the above

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View Answer High

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