A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is

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

0.7 mA

6.3 mA

7 mA

Correct Answer : Option (C) : 6.3 mA

Explanation :

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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