[" Two isolated point poles of strength "30A-m" and "60A-m" are placed at a distance of "],[0.3m" .The force of repulsion 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

The magnetic potential at a point due to pole of strength m at a distance r is

Two magnetic poles of pole strength 324 milli amp.m. and 400 milli amp m are kept at a distance of 10cm in air. The null point will be at a distance of …… cm, on the line joining the two poles, from the weak pole if they are like poles.

Two unlike magnetic poles of strength 10A-m each are held in air at a distance of 0*5m from each other. What is the magnetic force of attraction between them?

Two like poles of strengths m_(1) and m_(2) are at far distance apart. The energy repuired to bring them r_(0) distance apart is

The magnetic induction at a distance 'd' form the magnetic pole of unkown strength 'm' is B . If an identical pole is now placed at a distance of 2d from the first pole, the force between the two poles is

The repulsive force between two magnetic poles in air is 9 xx 10^(-3) N. if the two poles are equal in strength and are separated by a distance of 10 cm , calculate the pole strength of each pole .