Question

In the absence of an electric field, the mean velocity of free electrons in a conductor at absolute temperature $\left(T\right)$ is

• A. $zero$
• B. independent of $T$
• C. proportional to $T$
• D. proportional to $T^2$

Answer 1

The correct option is A $zero$

In the absence of electric field, the electron moves in zig-zag direction as shown in figure. So net displacement is zero, hence mean velocity of free electrons in a conductor at absolute temperature is zero