Mobility Of Electron MCQ - Practice Questions & Answers

Concepts Covered - 1

Mobility

Mobility-

Drift velocity per unit Electric field is called mobility of electrons.

$\mu=\frac{v_d}{E}$

$\mu-$ Mobility

$v_{d}-$ Drift velocity

Relation between conductivity and Mobility:

$\sigma=\mu n e$

Where n is the number of electrons per unit volume, e is the charge of the electron and $\sigma$ is the conductivity.

In case of a conductor conductivity decrease with the increase of temperature and in the case of semiconductor conductivity increase with increase in temperature.

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