The electron concentration in an undefined n -type semiconductor is the same as hole concentration in a undefined p -type semiconductor. An external field (electric) is applied across each of them. Co

Question

The electron concentration in an undefined n -type semiconductor is the same as hole concentration in a undefined p -type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.NEET 2021

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Electron's effective mass is smaller than holes therefore mobility of electrons is higher than holes and for equal electric field drift velocity of the electron will be greater compared to holes.

$I = n e A v_{d} I = n e A μ E$

$∵ μ_{e} > μ_{h o l e} so, {(v_{d})}_{e} > {(v_{d})}_{hole} ∴ I_{e} > I_{h o l e}$

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