Analog Electronics - ECE Questions and Answers

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A CE amplifier has a high input signal. In the wave shape of emitter current

positive and negative half cycles will be symmetrical

positive half cycle will be elongated and negative half cycle will be compressed

positive half cycle will be compressed and negative half cycle will be elongated

the half cycles may be either elongated or compressed

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An inverting voltage feedback is a

voltage amplifier

current amplifier

current to voltage converter

voltage to current converter

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If a transistor is operating with both of its Junctions forward biased, but with the collector base forward biased, but with the collector base forward bias greater than the emitter-base forward bias, then it is operating in the

forward active mode

reverse saturation mode

reverse active mode

forward saturation mode

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In a CE amplifier the Q point is very close to cutoff point on the load line. This results in

saturation clipping

cut off clipping

both saturation and cut off clipping

either saturation clipping or cut off clipping

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If the value of C₂ and C₃ are doubled, the oscillation frequency will be

quadrupled

doubled

unchanged

halved

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Which of the following statement about JFET is correct?

In an N-channel JFET, the channel is the narrowest under zero gate bias condition

In a JFET the gates are always forward biased

In a JFET, gate-source cut off voltage is numerically equal to the pinch off voltage

It is a voltage controlled device

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Assertion (A): In Darlington pair, the overall β is product of individual β_s

Reason (R): The voltage gain of a base driven amplifier is equal to ac collector voltage divided by ac base voltage

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

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A Wien bridge oscillator uses Wien bridge for

tuning and phase shift

tuning

phase shift

either tuning or phase shift

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A cascade amplifier will have higher cut off frequency

equal to that of single stage amplifier

less than that of single stage amplifier

more than that of single stage amplifier

none of these