Electrical Engineering MCQs

Page No. 134

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


aa reverse bias


b a wide depletion layer


clow resistance


dnone of the above


View Answer low resistance

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


a100 mA


b 100.1 mA


c110 mA


dnone of the above


View Answer 100.1 mA

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


a0o


b180o


c90o


d270o


View Answer 180o

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


a1800


b 00


c900


d2700


View Answer 00

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


a Is decreased


bIs increased


cRemains the same


d None of the above


View Answer Is increased

Emitter follower is used for________________?


aCurrent gain


bImpedance matching


cVoltage gain


d None of the above


View Answer Impedance matching

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


a Is increased


b Is decreased


cRemains the same


d Insufficient data


View Answer Is increased

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


aelectron current in the emitter


belectron current in the collector


chole current in the emitter


ddonor ion current



Emitter follower is a _______________circuit?


aVoltage feedback


bCurrent feedback


cBoth voltage and current feedback


dNone of the above


View Answer Voltage feedback

An emitter follower has ______________input impedance?


aZero


bLow


cHigh


dNone of the above


View Answer High

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