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 pole d. Attra...
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.