A pure semiconductor

Important Questions on Semiconductors

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 50

In an intrinsic semiconductor,

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 51

Doping materials are called impurities because

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 52

Which of the following is NOT a 'donor' impurity?

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 53

The ratio of the number of holes and the number of conduction electrons in an intrinsic semiconductor is

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 54

Let $n_{\mathrm{p}}$ and $n_{\mathrm{e}}$ be the number of holes and conduction electrons respectively in a semiconductor. Then,

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 55

In a pure silicon crystal $\left({\mathrm{n}}_{\mathrm{i}}={10}^{16} {\mathrm{m}}^{-3}\right)$ at $300 \mathrm{K}$, ${10}^{21}$ atoms of phosphorus are added per cubic meter. The new hole concentration will be

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 56

Germanium and silicon belong to the $4\mathrm{th}$ group of periodic table. Hence, each atom of $\mathrm{Ge}$ or $\mathrm{Si}$ will have

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Physics Crash Course MHT-CET>Chapter 24 - Semiconductors>Exercise 1>Q 57

After doping, resistivity of a semiconductor