VOICE QUIZ

Which are the mobile charge carriers present in semiconductor diode ?

Both A & B

Neutrons

Holes

Electrons

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The fact that there are many free electrons in a transistor emitter region means the emitter is

heavily doped.

None of these

undoped.

lightly doped.

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Which of the following is not a sinusoidal oscillator?

Relaxation oscillator

LC oscillator

Crystal oscillator

RC phase shift oscillator

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The leakage electric current ICBO flows in

the emitter and base leads.

the emitter, base and collector leads.

the base and collector leads.

the emitter and collector leads.

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A 10 V DC regulator power supply has a regulation of 0.005 %. The output voltage will vary within an envelope of __________________ milivolt.

0.05.

5.

2.5.

0.5.

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If the base supply voltage is disconnected, the collector-emitter voltage will equal

6 V.

0 V.

collector supply voltage.

10.5 V.

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Class AB operation is often used in power large signal) amplifiers in order to

Remove even harmonics

Reducing collector dissipation

Get maximum efficiency

Overcome a crossover distortion

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What will be the Potential barrier for Ge Diode ?

0.7V

0.03V

0.5V

0.3V

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

mean life time of the electrons.

mean life time of the holes.

junction area.

width of the depleted region.

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

base can be easily fabricated.

electric field gradient in base is high.

recombination in base region is minimum.

base can be easily biased.

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