Q. A charged particle of mass $m$ and charge $q$ travels in a circular path of radius $r$ that is perpendicular to a magnetic field $B$. The time taken by the particle to complete one revolution is
A) $\frac{2\pi B}{m}$
B) $\frac{2\pi\ m}{q\ B}$
C) $\frac{2\pi\ mq}{B}$
D) $\frac{2\pi\ q^{2}B}{m}$
Explanation
The correct answer is Option B: $\frac{2\pi\ m}{q\ B}$.
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.