Q. An electron, moving in a uniform magnetic field of induction of intensity $\overrightarrow{B},$ has its radius directly proportional to
A) Its charge
B) Magnetic field
C) Speed
D) None of these
Explanation
(c) $r = \frac{mv}{qB} \Rightarrow r \propto v$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.