Two north poles each of pole strength `8Am` are placed at corners `A` and `C` of a square `ABCD`. The pole that should be placed at `B` to make `D` as null point is

Two north poles each of pole strength m and a south pole of pole strength m are placed at the three corners of an equilateral triangle of side a. The intensity of magnetic induction field strength at the centre of the triangle is

Two north poles each of pole strength m and a south pole of pole strength m are placed at the three corners of an equilateral triangle of side a. The intensity of magnetic induction field strength at the centre of the triangle is

Force between two unit pole strength placed at a distance of one metre is

Three similar magnetic south poles each of streright 10 Am are placed at the corners of an equallateral triangle of side 20 cm . Find the magnetic force on one of the pole.

When the north poles of two different magnets are placed near each other , then the force and when the north pole and the south pole are placed near each other the force of …….results.

Two magnetic poles of pole strength 20 Am and 15 Am are kept at a distance of 10cm. The force acting on one of the poles is ...... ..

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

Two identical thin bar magnets, each of length L and pole strength m are placed at right angles to each other, with the North pole of one touching the south pole of the other. Find the magnetic moment of the system.