Q. The mobility of free electrons (charge $e,$ mass $m$ and relaxation time $\tau$) in a metal is proportional to
A) $\frac{e}{m}\tau$
B) $\frac{m}{e}\tau$
C) $\frac{e}{m\tau}$
D) $\frac{m}{e\tau}$
Explanation
The correct answer is Option A: $\frac{e}{m}\tau$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.