For an intrinsic semiconductor $\left(\mathrm{n}_{\mathrm{h}}\right.$ and $\mathrm{n}_{\mathrm{e}}$ are the…

For an intrinsic semiconductor $\left(\mathrm{n}_{\mathrm{h}}\right.$ and $\mathrm{n}_{\mathrm{e}}$ are the number of holes per unit volume and number of electrons per unit volume respectively)
  1. $\mathrm{n}_{\mathrm{h}} < \mathrm{n}_{\mathrm{e}}$
  2. $\mathrm{n}_{\mathrm{h}}=\mathrm{n}_{\mathrm{e}}$
  3. $\mathrm{n}_{\mathrm{h}}=\frac{\mathrm{n}_{\mathrm{e}}}{2}$
  4. $\mathrm{n}_{\mathrm{h}}>\mathrm{n}_{\mathrm{e}}$

Solution

- Semiconductors that are free from any impurities or chemically pure are termed Intrinsic. - In intrinsic semiconductors, the number of excited electrons is equal to the number of holes. i.e. $\mathrm{n}_{\mathrm{p}}=\mathrm{n}_{\mathrm{e}}$

Asked in: MHT CET 2023 (09 May Shift 1)

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