Q. A charged particle moves with velocity $v$ in a uniform magnetic field $\overrightarrow{B}$. The magnetic force experienced by the particle is
A) Always zero
B) Never zero
C) Zero, if $\overrightarrow{B}$ and $\overrightarrow{v}$ are perpendicular
D) Zero, if $\overrightarrow{B}$ and $\overrightarrow{v}$ are parallel
Explanation
(d) $\overrightarrow{F} = q(\overrightarrow{v} \times \overrightarrow{B})$; if $\overrightarrow{v}||\overrightarrow{B},$ then $\overrightarrow{F} = 0$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.