Question

A metal ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet is:

• A. is equal to \( g \)
• B. is less than \( g \)
• C. is more than \( g \)
• D. depends on the diameter of the ring and length of magnet

Hint:

The induced current in a conducting ring opposes the motion of a falling magnet, leading to a reduction in acceleration.

Answer 1

The Correct Option is B

When a bar magnet falls through a conducting ring, an induced current is produced in the ring due to Lenz's law, which opposes the motion of the magnet. This reduces the acceleration of the magnet compared to free fall, making the acceleration less than \( g \).
Final Answer: \[ \boxed{\text{Less than } g} \]