The mobility, µ, of a charge carrier in a material is defined as the drift speed

Question

The mobility, µ, of a charge carrier in a material is defined as the drift speed of the carrier, vd, divided by the magnitude of the electric field driving the current, µ = vd/E. An electric field of magnitude 8.0 105 V/m is applied in the +x-direction in a piece of an intrinsic semiconductor, for which the mobilities of electrons and holes at room temperature are 0.12 m2/V·s and 0.060 m2/V·s respectively. What are the drift velocities of electrons and holes at room temperature?
THE ANSWER SHOULD NOT BE A EXACT NUMBER, BUT CONTAINS SOME UNKNOWN FACTOR.

Explanation / Answer

×E=V

800000×0.12=96000*-i

in the similar way

800000×0.06=48000*i

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