Q. The bob of a simple pendulum is replaced by a magnet. The oscillation are set along the length of the magnet. A copper coil is added so that one pole of the magnet passes in and out of the coil. The coil is short-circuited. Then which one of the following happens
A) Period decreases
B) Period does not change
C) Oscillations are damped
D) Amplitude increases
Explanation
(c) It is due to the magnetic field produced by coil
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.