Mobility Of Electron MCQ - Practice Questions with Answers

1. Mobility-

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

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

$\mu-$ Mobility

$
v_d-\text { 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.