In all metals_________ - Electronic Devices and Circuits

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

In all metals_________

current flow by electrons as well as by holes

resistivity decreases with increase in temperature

conductivity decreases with increase in temperature

the gap between valence and conduction bands is small

Correct Answer : Option (C) : conductivity decreases with increase in temperature

Explanation : In all metals conductivity decreases (and resistance increases) with increase in temperature.

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