Задача 30864.

A wire ring with a radius R = 5 cm lies on the table. A current with a force of I \u003d 2 A flows through the ring. Keeping the current strength unchanged, the ring was turned over from one side to the other. What work was perfect in doing so? The vertical component of the earth´s magnetic field strength is assumed to be Hb=40 A/m.

A detailed solution with a brief note of the conditions, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
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