Which of the following is not correct about semiconductors in electronic devices?

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

Degenerated semiconductors behave like a conductor

Electrons are present below Fermi level in a semiconductor

Fermi level is independent of temperature and doping

Pentavalent atoms are used in an n-type extrinsic semiconductor

Correct Answer : Option (C) : Fermi level is independent of temperature and doping

Explanation : Fermi level is the highest level of electrons at 0K. Below Fermi level, all levels are filled with electrons. Fermi level depends on the temperature and the doping of the semiconductor.

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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