Задача 31569.

The magnetic field created by the conductor ring radius R = 20 cm, through which flows the current I = 100 A. On the axis of the ring there is another ring of small dimensions with a magnetic moment p = 10 mA / m ^ 2. Parallel to the ring plane, and the distance d between the centers is equal to 1 cm. Find the force acting on the small ring?

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.