(a) Describe drift and diffusion currents and derive Einstein's relat…

Previous year question for Applied Engineering Physics.

Question

(a) Describe drift and diffusion currents and derive Einstein's relation for a P-N junction. 12

(b) The resistivity of a doped silicon material is $9 \times 10^{-3}\ \Omega\text{m}$. The Hall co-efficient is $3.6 \times 10^{-4}\ \text{m}^3/\text{C}$. Assume single carrier conduction, find the mobility and density of charge carriers. 8

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