If temperature of a good conductor increses, how does the relaxation time of electrons in the conductor change?

Does the current depend on the length of the conductor?

Resistance of a conductor increases with the rise of temperature, because.

The metallic conductor is at temperature theta_1 . The temperature of metallic conductor is increased to theta_2 . How will the product of its resistivity and conductivity change?

The specific resistance of a conductor increases with Increase in temperature:

Explain how the resistivity of a conductor depends upon relaxation time tau ?