Q. Which of the following statements is true
A) The presence of a large magnetic flux through a coil maintains a current in the coil if the circuit is continuous
B) A coil of a metal wire kept stationary in a non-uniform magnetic field has an $e$.m.f. induced in it
C) A charged particle enters a region of uniform magnetic field at an angle of $85{^\circ}$ to the magnetic line of force; the path of the particle is a circle
D) There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it
Explanation
(d) When charged particle enters perpendicularly in a magnetic field, it moves in a circular path with a constant speed. Hence it’s kinetic energy also remains constant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.