Analog Electronics - ECE Questions and Answers

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A distorted sinusoidal has the amplitudes A₁, A₂, A₃ ... of the fundamental, second, harmonic third harmonic, ... respectively. The total harmonic distortion is

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To obtain very high I/P and O/P impedances in a feedback amplifier, the topology used is

voltage series

current series

voltage shunt

current shunt

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Efficiency of a half wave diode rectifier is less than 40%.

True

False

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Generally op amp is used in

open loop

closed loop

cascaded loop

either (a) or (c)

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The equivalent circuit of an op-amp has

a virtual ground at input

a virtual ground at output

virtual ground at input as well as at output

none of the above

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In a transistor with normal bias

the emitter junction has a low resistance

the emitter junction has a very high resistance

the emitter junction supplies majority carries into the base region

none of the above

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A transistor has

collector
emitter
base

In a N-P-N transistor the electron flow into the transistor at

I only

II only

II and III only

I and II only