Questions in magnetism

Select	Question
	A magnetic needle is kept in a non-uniform magnetic field. It experiences
	The magnetic induction in air at a distance d from an isolated point pole of strength m unit will be
	A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60°. The torque required to maintain the needle in this position will be
	A long magnetic needle of length 2L, magnetic moment M and pole strength m units is broken into two pieces at the middle. The magnetic moment and pole strength of each piece will be
	Two identical thin bar magnets each of length l and pole strength m are placed at right angle to each other with north pole of one touching south pole of the other. Magnetic moment of the system is
	Magnetic induction is a
	What happens to the force between magnetic poles when their pole strength and the distance between them are both doubled
	Force between two unit pole strength placed at a distance of one metre is
	A small bar magnet of moment M is placed in a uniform field H. If magnet makes an angle of 30° with field, the torque acting on the magnet is
	If a hole is made at the centre of a bar magnet, then its magnetic moment will