Q.
A charged particle is projected in a plane perpendicular to a uniform magnetic field. The area bounded by the path described by the particle is proportional to
A) The velocity
B) The momentum
C) The kinetic energy
D) None of these
Explanation
(c) $r = \frac{\sqrt{2mK}}{qB}$ and $A = \pi r^{2} \Rightarrow A = \frac{\pi(2mK)}{q^{2}B^{2}} \Rightarrow A \propto K$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.