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An electric field us applied to a semico...

An electric field us applied to a semiconductor.Let the number of charge carriers be n and the average drift speed be v.If the temperature is increased,

A

both n and v will increase

B

n will increase and v will decrease

C

both n and v will decrease

D

nwill decrease and v will increase

Text Solution

Verified by Experts

The correct Answer is:
B
As the temperature is increased, more electrons are able to move from valance band to conduction band, hence the number of charge carriers increases but with increase in the temperature the frequency of collisions increases so the average drift speed decreases
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