Q. A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
A) Keep oscillating with the old time period
B) Keep oscillating with a smaller time period
C) Keep oscillating with a larger time period
D) Come to rest very soon
Explanation
(d) Emf is induced in the ring and it opposes the motion. Hence due to the resistance of the ring all energy dissipates
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.