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Flat round frame with a diameter of 10 cm is in a uniform magnetic field. By flowing current of the frame 20 A. In many changes torque acting on the frame, turning the plane of the frame through an angle of 60 °? Before turning the plane of the frame coincides with the direction of the field. The field strength of 20 A / m, the environment - air.

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

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