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

Q. By increasing the temperature, the specific resistance of a conductor and a semiconductor-
(i) increases for both.
(ii) decreases for both.
(iii) increases for a conductor and decreases for a semiconductor.
(iv) decreases for a conductor and increases for a semiconductor.

Answer: (iii) increases for a conductor and decreases for a semiconductor.

Specific resistance of a conductor increases and for a semiconductor decreases with increase in temperature because for a conductor, a temperature.

coefficient of resistivity α = + ve
and for a semiconductor, α = -ve

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