Calculate the average random thermal energy at T=300K?

A)
38eV
B)
3.8eV
C)
0.38eV
D)
0.038eV

Correct Answer : Option (D) :   0.038eV

Explanation : Average random thermal energy=3/2*k*T=0.038eV.

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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)
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B)
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C)
gallium phosphide
D)
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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)
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Correct Answer :   emitter base : forward, collector base : reverse

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