Magnetism and M...

The magnetism of magnet is due to

The magnetic field at a point x on the axis of a small bar magnet is equal to the field at a pointy on the equator of the same magnet. The ratio of the distance 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 intesity 0.3 C.G.S. units. The amount of work done in deflecting it by an angle of 30° in C.G.S. units is

A bar magnet having centre O has a length of 4 cm. Point P₁ is in the broad side-on and P₂ is in the end side-on position with OP₁ = OP₂ = 10 metres. The ratio of magnetic intensities H at P₁ and P₂ is

The magnetic field due to a short magnet at a point on its axis at distance X cm from the middle point of the magnet is 200 gauss. The magnetic field at a point on the neutral axis at a distance X cm from the middle of the magnet is

Which of the following is the most suitable material for making permanent magnet

In the case of bar magnet, lines of magnetic induction

A magnet of length 0.1 m and pole strength 10^–4 Am is kept in a magnetic field of 30 WB/m² at an angle 30°. The couple acting on it is…. × 10^–4 Nm.

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 exists in space initially directed from left ro right. When a bar of soft iron is placed in the field paralled to it, the lines of force passing through it will be represented by