Mobility Of Electron MCQ - Practice Questions & Answers

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For a conductor, if temperature applied across it is increased

mobility increases

mobility decreases

Resistance decreases

None of these

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$m^{2} V^{- 1} s^{- 1}$ is the SI unit of which of the following ?

Drift velocity

Mobility

Resistivity

Potential gradient

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Concepts Covered - 1

Mobility

Mobility-

$μ = \frac{v_{d}}{E}$

$μ -$ Mobility
$v_{d}$ -Drift velocity
Relation between conductivity and Mobility:

$σ = μ n e$
Where n is the number of electrons per unit volume, e is the charge of the electron and $σ$ 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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