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Electronic Devices and Circuits - Engineering

Q1:

The conductivity of a semiconductor crystal due to any current carrier is not proportional to

A mobility of the carrier

B effective density of states in the conduction band

C electronic charge

D surface states in the semiconductor

ANS:A - mobility of the carrier

Conductivity=electronic concentration (n) x charge(q) x mobility (μ).
as nxq= charge density.

So, conductivity is proportional to n, charge, mobility, and charge density. So the ans is option D