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The conductivity of a semiconductor incr...

The conductivity of a semiconductor increases with increase in temperature because

A

number density of free current increase

B

relaxation time inceases

C

both number density of carries and relaxation time incease

D

number density of carries increases relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density

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The correct Answer is:
d
The conductivity of a semiconductor increases with increases in temperature because the number density of current carries increases , relaxation time decreases but effect of decrease in relaxation in much less than increase in number density .
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