An electric field is applied to a semi-conductor. Let the number of charge carriers be n and the average drift speed be v. If the temperature is increased:
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Question

An electric field is applied to a semi-conductor. Let the number of charge carriers be n and the average drift speed be v. If the temperature is increased:

G1 Physics · Accepted Answer

In a semiconductor, raising temperature generates more electron-hole pairs, so carrier concentration n increases. Increased lattice scattering reduces mobility, so drift speed for the same electric field decreases. Correct answer: B.