A north pole of strength 50 Am and south pole of strength 100 Am are separated by a distance of 10 cm in air. Find the force between them.

Two magnetic poles of strengths 40Am and 10 Am are separated by a distance of 20 cm in air. Find the force between them. If the distance is reduced to 10 cm, find the force.

The magnetic moment of a length 10 cm and pole strength 4.0 Am will be

Two isolated point poles of strength 30 Am and 60 Am are placed a distance of 0.3 m.The force of repulsion is

Six s imilar magnetic poles are placed on six corners of a regular hexagon of side 10 cm . A south pole of strength 10 Am is placed at the centre of hexagon. Find the magnetic force on the south pole.