Electrical Engineering MCQs

Page No. 136

Negative feedback is employed in __________________?


aOscillators


b Rectifiers


cAmplifiers


dNone of the above


View Answer Amplifiers

The voltage gain of a transistor connected in common collector arrangement is____________?


aequal to 1


bmore than 10


cmore than 100


dless than 1


View Answer less than 1

The voltage gain in a transistor connected in___________arrangement is the highest?


acommon base


bcommon collector


c common emitter


dnone of the above


View Answer common emitter

A feedback circuit usually employs _________________ network?


aResistive


bCapacitive


c Inductive


dNone of the above


View Answer Resistive

The power gain in a transistor connected in___________arrangement is the highest?


acommon emitter


bcommon base


c common collector


dnone of the above


View Answer common emitter

The input impedance of a transistor connected in___________arrangement is the highest?


acommon emitter


bcommon collector


ccommon base


dnone of the above


View Answer common collector

The value of ß for a transistor is generally____________?


a1


bless than 1


cbetween 20 and 500


dabove 500


View Answer between 20 and 500

When current feedback (negative) is applied to an amplifier, its input impedance _____________?


a Is decreased


bIs increased


cRemains the same


dNone of the above


View Answer Is decreased

If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately________________?


a500


b 100


c1000


d5000


View Answer 100

The gain of an amplifier with feedback is known as____________gain?


aResonant


b Open loop


c Closed loop


d None of the above


View Answer Closed loop

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