Analog Electronics - ECE Questions and Answers

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Saturation of iron core causes distortion.

True

False

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Which of the following is non-sinusoidal oscillator?

Multivibrator

Relaxation oscillator using UJT

Relaxation oscillator using tunnel diode

Any of the above

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Low gain-bandwidth product of a JFET is due to

reduced number of holes

junction capacitive effects

low degree of isolation between input and output

all of the above

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The circuit of the figure is an example of feedback of the following type

current series

current shunt

voltage series

voltage shunt

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Oscillation frequency in Wein bridge oscillator is

f = 2p CR

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Assertion (A): A class C amplifier can also be used as frequency multiplier

Reason (R): When narrow current pulses drive a resonant circuit the output can be a near perfect sine wave

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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The parameter β of a BJT change by 300%. If self bias is used in the amplifier using this BJT, the quiescent value of I_C and V_CE remain almost the same.

True

False

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A bypass capacitor produces

dc ground

ac ground

both dc and ac ground

none of the above

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Rise time in a transistor is change from

10% of its final value to 90% of its final value

0% of its final value to 90% of its final value

10% of its final value to 100% of its final value

10% to its final value to 50% of its final value