To a germanium sample, traces of gallium are added as an impurity. The resultant sample would behave like:

a conductor

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a p-type semi-conductor

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an n-type semi-conductor

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an insulator

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Solution

The correct option is B a p-type semi-conductor
Gallium is a trivalent atom, so the resultant sample will behave as p-type semiconductor.

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The valence of an impurity added to germanium crystal in order to convert it into a P-type semi conductor is ?

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