Задача id13053

When a magnetic field is turned on, perpendicular to the plane of the coil of radius R, a charge Q flows through the coil. What charge will flow through the coil if, with a constant field, it is folded into a “figure eight” consisting of two circles, with the radius of the smaller circle being equal to R/4? The figure-of-eight plane is also perpendicular to the magnetic field.

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