Q. An electron is moving on a circular path of radius $r$ with speed $v$ in a transverse magnetic field $B.\ e/m$ for it will be
A) $\frac{v}{Br}$
B) $\frac{B}{rv}$
C) $Bvr$
D) $\frac{vr}{B}$
Explanation
(a) $r = \frac{mv}{qB} \Rightarrow \frac{e}{m} = \frac{v}{rB}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.