To obtain p-type extrinsic semi-conductor, the impurity element to be added to germanium should be valency

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Solution

The correct option is B 3
To get p-type semiconductor, trivalent impurity should be added to germanium.

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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 ?

Germanium or silicon becomes extrinsic semi-conductor due to

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