Q. A metallic block has no potential difference applied across it, then the mean velocity of free electrons at absolute temperature $T$ is
A) Proportional to $T$
B) Proportional to $\sqrt{T}$
C) Zero
D) Finite but independent of $T$
Explanation
(c) In the absence of electric field (or potential difference applied) across the conductor, the average thermal velocity of electron is zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.