Questions in magnetism

Select	Question
	The dipole moment of a short bar magnet is $1.25 A-m^2$. The magnetic field on its axis at a distance of 0.5 metre from the centre of the magnet is
	A permanent magnet
	Two equal bar magnets are kept as shown in the figure. The direction of resultant magnetic field, indicated by arrow head at the point P is (approximately)
	The S.I. unit of magnetic permeability is
	A short bar magnet placed with its axis at 30° with a uniform external magnetic field of 0.16 Tesla experiences a torque of magnitude 0.032 Joule. The magnetic moment of the bar magnet will be
	The magnetic field to a small magnetic dipole of magnetic moment M, at distance r from the centre on the equatorial line is given by (in M.K.S. system)
	The incorrect statement regarding the lines of force of the magnetic field B is
	A straight wire carrying current i is turned into a circular loop. If the magnitude of magnetic moment associated with it in M.K.S. unit is M, the length of wire will be
	A bar magnet of magnetic moment $\overrightarrow M $ is placed in a magnetic field of induction $\overrightarrow B $. The torque exerted on it is
	For protecting a sensitive equipment from the external magnetic field, it should be