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Define the term 'mobility' of charge car...

Define the term 'mobility' of charge carriers. Write its S.I. unit.

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Mobility is defined as the magnitude of the drift velocity per unit electric field.
`mu=(|V_d|)/E=(alphatau)/E=(eE)/m tau/E=e/m tau`
where`tau` is the average collision time for electrons.
The SI unit of mobility is `m^2//Vs` or `m^2V^(-1)S^(-1)`
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