Лаг1989 задача №16.40

On the direct, infinitely long wire, there is a current I = 3.14A. A circular turn with radius R = 30 cm is located so that its plane is parallel to the straight wire, and the perpendicular drawn to it from the center of the turn is normal to the plane of the turn. The current passes through the current I2 = 3 A. The distance from the center of the turn to the straight wire r = 20 cm. Find the magnetic induction of the field in the center of the coil.

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