Analog Electronics - ECE Questions and Answers

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The more negative gate voltage, the conductive channel becomes

narrower

wider

thicker

linear

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Which circuit has its output signal from, the emitter?

Common base

Common emitter

Emitter follower

None of the above

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Symbol shown in figure represents a

P-channel DEMOSFET

N-channel DEMOSFET

UJT with N-type base

UJT with P-type base

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A JFET is a

unipolar device

bipolar device

tripolar device

none of the above

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Which configuration has high input impedance and low output impedance?

CB and CE

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Assertion (A): An ac amplifier uses coupling capacitors at input and output

Reason (R): The capacitive reactance varies inversely with frequency. It is infinite for dc

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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Common base configuration is little used because

it has low input impedance

it has high input impedance

it does not heat up

it has very high gain

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In figure it is desired that output wave is symmetrical. Then

both diodes should be similar and |V₁| = |V₂|

both diodes should be similar

|V₁| = |V₂|

either (a) or (b)

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If the plate supply voltage for a plate modulated class C amplifier is E volts, the maximum plate-cathode voltage could be almost as high as

E/2