Questions in magnetism

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	The pole strength of a bar magnet is 48 ampere-metre and the distance between its poles is 25 cm. The moment of the couple by which it can be placed at an angle of $30^o$ with the uniform magnetic intensity of flux density 0.15 Newton /ampere-metre will be
	The magnetic field at a point x on the axis of a small bar magnet is equal to the field at a point y on the equator of the same magnet. The ratio of the distances of x and y from the centre of the magnet is
	A magnet of magnetic moment 20 C.G.S. units is freely suspended in a uniform magnetic field of intensity 0.3 C.G.S. units. The amount of work done in deflecting it by an angle of 30o in C.G.S. units is
	A bar magnet having centre O has a length of 4 cm. Point $P_1$ is in the broad side-on and $P_2$ is in the end side-on position with $OP_1 = OP_2 = 10$ metres. The ratio of magnetic intensities H at $P_1$ and $P_2$ is
	The magnetic field due to a short magnet at a point on its axis at distance Xcm from the middle point of the magnet is 200 Gauss. The magnetic field at a point on the neutral axis at a distance Xcm from the middle of the magnet is
	Which of the following, the most suitable material for making permanent magnet is
	In the case of bar magnet, lines of magnetic induction
	A sensitive magnetic instrument can be shielded very effectively from outside magnetic fields by placing it inside a box of
	The field due to a magnet at a distance R from the centre of the magnet is proportional to
	A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by

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