Question

A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction (as shown) 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

Answer 1

Answer: (D)

Emf induces in ring and it will opposes the motion. Hence, due to the resistance of the ring all energy dissipates.