In which of the following is the width of junction barrier very small? - Electronic Devices and Circuits

Electronics and Communication Engineering (ECE) : Electronic Devices and Circuits - Quiz(MCQ)

In which of the following is the width of junction barrier very small?

A)

Schottky diode

B)

PIN diode

C)

Photo diode

D)

Tunnel diode

Correct Answer : Option (A) : Schottky diode

Explanation : Schottky diode has very small depletion layer.

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The kinetic energy of photoelectrons emitted by a photo sensitive surface depends on

A)

angle of incidence of radiation

B)

surface conditions of the surface

C)

intensity of the incident radiation

D)

wavelength of the incident radiation

Correct Answer : wavelength of the incident radiation

For radiating ultraviolet rays, LEDs use

A)

gallium arsenide

B)

zinc sulphide

C)

gallium phosphide

D)

None of the above

Correct Answer : zinc sulphide

For an P-N-P transistor in normal operation its junction are biased as

A)

emitter base : reverse, collector base : reverse

B)

emitter base : reverse, collector base : forward

C)

emitter base : forward, collector base : forward

D)

emitter base : forward, collector base : reverse

Correct Answer : emitter base : forward, collector base : reverse

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