Assertion: The number of electrons in a `p`-type silicon semiconductor is less than the number of electrons ina pure silicon semiconductor at room temperature.
Reason: It is due to law of mass action.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

A

Explanation

According to law of mass action, `n_(i)^(2)=n_(e)n_(h)`. In intrinsic semiconductors `n_(i)=n_(e)=n_(h)` and for P-type semiconductor `n_(e)` would be less than `n_(i)`, since `n_(h)` is necessarily more than `n_(i)`.