An LED has a rating of 2 V and 10 mA. It is used along with 6V battery. The range of series resistance is

A)
0 to 200 Ω
B)
200 - 400 Ω
C)
200 Ω and above
D)
400 Ω and above

Correct Answer : Option (D) :   400 Ω and above

Explanation :

Recently Updated in Electronic Devices and Circuits Questions
The kinetic energy of photoelectrons emitted by a photo sensitive surface depends on
A)
angle of incidence of radiation
B)
surface conditions of the surface
C)
intensity of the incident radiation
D)
wavelength of the incident radiation

Correct Answer :   wavelength of the incident radiation

For radiating ultraviolet rays, LEDs use
A)
gallium arsenide
B)
zinc sulphide
C)
gallium phosphide
D)
None of the above

Correct Answer :   zinc sulphide

For an P-N-P transistor in normal operation its junction are biased as
A)
emitter base : reverse, collector base : reverse
B)
emitter base : reverse, collector base : forward
C)
emitter base : forward, collector base : forward
D)
emitter base : forward, collector base : reverse

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

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