EC > GATE 2015 SET-2 > Electronic Devices
The energy band diagram and the electron density profile n(x) in a semiconductor are shown in the figures. Assume that n(x) = 1015 e(qαx / kT) cm−3, with α = 0.1 V/cm and x expressed in cm. Given Dn = 36 cm2s−1, and kT⁄q = 0.026 V, D⁄μ = kT⁄q. The electron current density (in A/cm2) at x=0 is
Correct : c
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