Doping of silicon with indium leads to which type of semiconductors?

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Solution

Indium is a trivalent impurity atom. When added to an intrinsic semiconductor forms a semiconductor having holes as majority carriers and electrons as minority carriers. So p-type semiconductor is formed.

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Which of the following statements are true about semiconductors ?

(a) Silicon doped with electron rich impurity is a p-type semiconductor

(b) Silicon doped with an electron rich impurity is an n-type semiconductor

(d) An electron vacancy increases the conductivity of n-type semiconductor

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