Question

By increasing the temperature, the specific resistance of a conductor and a semiconductor -

Options

• increases for both.

• decreases for both.

• increases for a conductor and decreases for a semiconductor.

• decreases for a conductor and increases for a semiconductor.

Answer 1

increases for a conductor and decreases for a semiconductor.

Explanation:

Because a conductor's specific resistance grows and a semiconductor's specific resistance drops as temperature rises, the specific resistance of a conductor increases, and the specific resistance of a semiconductor decreases.

coefficient of resistivity `alpha = + "ve"`
and for a semiconductor, `alpha = -"ve"`