The units frequently used to measure the forward bias and reverse bias current of a diode are

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

mA and ÂµA respectively

mA and mA respectively

ÂµA and ÂµA respectively

ÂµA and mA respectively

Correct Answer : Option (A) : mA and ÂµA respectively

Explanation : The currents in forward bias is generally in MA and in the reverse bias it is very small and is generally measured in µA.

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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