Question: (c) (i) Explain the drift velocity in a semiconductor. [2 marks] (ii) An electric eld of 50 Vim is applied to a semiconductor containing 1x1017cm3

(c) (i) Explain the drift velocity in a semiconductor. [2 marks] (ii) An electric eld of 50 Vim is applied to a semiconductor containing 1x1017cm3 mobile positive charges, each being 1.6x10'190. Find the magnitude and direction of the drift velocity and the current density if the low eld mobility is 0.5m2V'1s1. [3 marks]

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