Statement-1 : The temperature coefficient of resistance is positive for metals and negative for p-type semiconductor.
Statement-2 : The effective charge carriers in metals are negatively charged whereas in p-type semiconductor, they are positively charged

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

B

Explanation

In metal due to presence of electrons.
As `T uarr, rho uarr R uarr, therefore alpha` is positive