ANALOG ELECTRONICS QUIZ

The collector current is 1.5 mA. If the current gain is 50, the base current is

150 µA.

3 µA.

3 mA.

30 µA.

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The diffusion capacitance of a forward biased P+N junction diode with a steady electric current I depends on

width of the depleted region.

mean life time of the electrons.

mean life time of the holes.

junction area.

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For audio frequency applications, the popular oscillator used is

Crystal oscillator

Hartley oscillator

Phase shift oscillator

Wien bridge oscillator

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Most of the electrons in the base of an NPN transistor do not recombine because they

flow out of the base.

must flow through the base.

have a negative charge.

have a long lifetime.

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The collector - emitter voltage is usually

none of these.

less than the collector supply voltage.

equal to the collector supply voltage.

more than the collector supply voltage.

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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

51dB

98dB

102dB

49dB

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If the current gain is 100 and the collector current is 10 mA, the base current is

1 A.

100 µA.

10 µA.

10 A.

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The first step in analyzing emitter-based circuits is to find the

base current.

supply current.

emitter current.

collector current.

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In a CB amplifier the maximum efficiency could be

99%

50%

85%

25%

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IGFET is a

square - law device.

linear device.

3 / 2 power - low device .

half - power device.

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