ANALOG ELECTRONICS QUIZ

If the emitter resistor is open, the collector voltage is

high.

unknown.

unchanged.

low.

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If the base current is 100 mA and the current gain is 30, the emitter current is

3.1 A.

3 A.

3.33 mA.

10 A.

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Which of the following is the pentavalent material ?

Boron

Arsenic

Neon

Gallium

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The ÃŽÂ² of a transistor may be determined directly from the curve plotted between

VCE and IC for constant IB.

VCE and IC for constant IE.

VCE and IE for constant IB.

VBE and IE for constant VCE.

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When will be the P-N junction is formed ?

Two opposite doped materials

In depletion region

In reverse biased region

None of these

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In all base driver amplifiers

ac emitter voltage is 180° out of phase with ac base voltage

None of these

ac collector voltage is in phase with ac base voltage

ac collector voltage is 180° out of phase with ac base voltage

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Which of following is not an essential element of a DC power supply?

Voltage regulator.

Voltage amplifier.

Rectifier.

Filter.

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What is the charge of mobile charge carriers of holes ?

Positively charged

None of these

No charged

Negatively charged

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Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is

102dB

98dB

51dB

49dB

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In a bipolar junction transistor the base region is made very thin so that

electric field gradient in base is high.

recombination in base region is minimum.

base can be easily biased.

base can be easily fabricated.

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