A metal ring is held horizontally and bar magnet is dropped... | Physics | SolveeIt | Solveeit

Today, August 18

Question

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

A

is equal to g

B

is less than g

C

is more than g

D

depends on the diameter of ring and length of magnet

Answer

is less than g

Explanation

Solution

As the magnet falls, the magnetic flux linked with the ring increases. This induces emf in the ring which opposes the motion of the falling magnet, so $a < g.$