Задача 30828.

The magnetic field is created by a straight long wire with a current of I1 = 3 A and a circular contour of radius R = 10 cm with 10 turns, a = 20 cm. Find the current I2 in the circuit if the induction of the resultant magnetic field at the center of the contour is B = 5 × 10 ^ -6 T.

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