The resistance of a metallic conductor increases with temperature because

Question

The resistance of a metallic conductor increases with temperature because (A) Free electron density increases (B) Conductor expands (C) Number of collisions between electrons carriers increases (D) Number of collisions between electrons and vibrating ion core of the conductor increases.

Tardigrade Admin · Accepted Answer

With the increase of temperature of a metalic conductor, the average collision time for electrons decreases. In other way, number of collisions between electrons and vibrating ion cores of the conductor increases, with the increase in temperature, hence its resistance increases

Q. The resistance of a metallic conductor increases with temperature because

Free electron density increases

Conductor expands

Number of collisions between electrons carriers increases

Number of collisions between electrons and vibrating ion core of the conductor increases.

With the increase of temperature of a metalic conductor, the average collision time for electrons decreases. In other way, number of collisions between electrons and vibrating ion cores of the conductor increases, with the increase in temperature, hence its resistance increases