In a uniform magnetic field of 10 mT placed square frame with a side of 4 cm, which has 10 turns. The plane of the frame makes to the direction of the magnetic field angle of 30 °. Determine: a) the magnetic flux penetrating the frame, b) the work done by the magnetic field by rotating the frame to the position of equilibrium, if on coils passing a current of 5 A.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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