If a diamagnetic substance is brought near south or north pole of a bar magnet it is a. Attracted by the poles b. Repelled by the polesc. Attracted by north pole and repelled by south pol...
Answer is B.
Under what conditions does a charge affect a magnet?
When a fast moving charge particle enter to a magnetic field as well as force is developed in the charge which is F = Bqv sinΘ, where B is magnetic field intensity, q is the charge, v is the velocity of charge particle and Θ be the angle between the velocity and magnetic fields. Due to this reason, the fast moving charge particle affect the magnet.