A coil of wire with a radius of 20 cm is located in the plane of the magnetic meridian. A small magnetic needle is installed in the center of the coil, which can rotate around a vertical axis. At what angle will the needle deviate if a current of 12 A is passed through the coil? (The horizontal component of the induction of the earth´s magnetic field is taken equal to 2 * 10^-5 T.)
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