Name the force which acts in the case of attraction of common pins towards a magnet.
Hence, the magnetic force of attraction acts in the case of pins being attracted by a magnet.
Explain the following :
(a) When two pins are hung by their heads from the same pole of a magnet, their pointed ends move apart.
(b) Several soft iron pins can cling, one below the other, from the pole of a magnet.
(c) The north end of a freely suspended magnetic needle gets attracted towards a piece of soft iron placed a little distance away from the needle.
Name the type of force which acts in the following cases: