Question

Assertion The average time of collisions $\tau$, decreases with increasing temperature.
Reason At increased in temperature, average speed of the electrons, which act as the carriers of current, increases, resulting in more frequent collisions.

• A. Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Assertion is incorrect but Reason is correct. Reason At increased in temperature, average speed of the electrons, which act as the carriers of current, increases, resulting in more frequent collisions.

Answer 1

Answer: (A)

With increase in temperature, average speed of the electrons, which acts as the carriers of current, increases resulting in more frequent collisions. The average time of collisions $\tau$, thus decreases with temperature.