Q. 75.0( 1 Vote )

A semiconductor i A. The hole concentration increases.

B. The hole concentration decreases.

C. The electron concentration increases.

D. The electron concentration decreases.

Answer :

A donor will form four bonds with neighboring atoms of the semiconductors and the fifth electron of the donor atom will be responsible for conduction. Thus, the concentration of electrons tends to increase. Then some of these electrons recombine with holes which lead to the decrease in the concentration of the holes. Therefore, B and C are correct.

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