Multiple choice

The silicon sample with unit cross-sectional area shown below is in thermal equilibrium. The following information is given: T=300K, electronic charge=1.6x10-19C, thermal voltage=26mV and electron mobility = 1350cm2/V-s

The magnitude of the electron drift current density at x = 0.5 $\mu$m is

  1. 2.16$\times$104 A/cm2
  2. 1.08$\times$104 A/cm2
  3. 4.32$\times$103 A/cm2
  4. .48$\times$102 A/cm2
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A Correct answer
Explanation

   Sample is in thermal equilibrium so, electric field

$E = \dfrac{1}{1\mu m} = 10 \ kV/cm$

 

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