If a sample of germanium and a sample of Si have the impurity density and are kept at room temperature then

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

resistivity of Si will be higher than of germanium

both will have equal -ve resistivity

both will have equal value of resistivity

resistivity of germanium will be higher than that of silicon

Correct Answer : Option (A) : resistivity of Si will be higher than of germanium

Explanation : Since the majority of charge carrier is better in Ge than in Si, for the same concentration of charge carriers, the conductivity of Ge is higher than that of Si.

Recently Updated in Electronic Devices and Circuits Questions

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

angle of incidence of radiation

surface conditions of the surface

intensity of the incident radiation

wavelength of the incident radiation

Correct Answer : wavelength of the incident radiation

For radiating ultraviolet rays, LEDs use

gallium arsenide

zinc sulphide

gallium phosphide

None of the above

Correct Answer : zinc sulphide

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

emitter base : reverse, collector base : reverse

emitter base : reverse, collector base : forward

emitter base : forward, collector base : forward

emitter base : forward, collector base : reverse

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

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