Question

Why resistance of conductor increases with increase in temperature?

Answer 1

Answer:

When metallic conductor is heated,the atoms in metal vibrate with greater amplitude and frequency. Due to increase in temperature, the thermal velocities of free electrons also increases. Therefore the number of collision between free electrons and atoms increases.This lead to increase the opposition to the movement of electrons and thus the conductor increases with rise in temperature.

Answer 2

${\tt{\underline{\bold{Answer:-}}}}$

The resistance of a conductor increases with an increase in temperature because the thermal velocity of the free electrons increases as the temperature increases. This results in an increase in the number of collisions between the free electrons.

• If we raise the temperature of the metallic conductor, the resistance will increase.

• What happens in the case of a conductor is that as the temperature rises, the ions within the metal conductor gain energy and begin to oscillate around their mean positions.

• All of these oscillating ions collide with electrons, causing resistance to increase.

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