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GATE ECE 2007 | Question-32

A $p^{+} n$ junction has a built-in potential of $0.8 \mathrm{~V}$. The depletion layer width at a reverse bias of $1.2 \mathrm{~V}$ is $2 \; \mu \mathrm{m}$. For a reverse bias of $7.2 \mathrm{~V}$, the depletion layer width will be

  1. $4 \; \mu \mathrm{m}$
  2. $4.9 \; \mu \mathrm{m}$
  3. $8 \; \mu \mathrm{m}$
  4. $12 \; \mu \mathrm{m}$
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