Q. If a piece of metal was thought to be magnet, which one of the following observations would offer conclusive evidence
A) It attracts a known magnet
B) It repels a known magnet
C) Neither (a) nor (b)
D) It attracts a steel screw driver
Explanation
(b) Repulsion is the sure test of magnetism
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.