Задача 30179.

A flat circuit with an area S=100 cm^2, through which a direct current of force I=12A is passed, is placed in a uniform magnetic field with induction B=20 mT. The plane of the contour is perpendicular to the lines of magnetic induction. How much work will be done when the contour plane is rotated 45 degrees?

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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