A flat contour with an area of 4 cm ^ 2 is parallel to a uniform magnetic field with a strength of 10 ^ 4 A / m. A current of 2 A was briefly passed along the circuit, and the circuit began to rotate freely. Assuming conventionally at the beginning of the movement the current strength and torque are unchanged, determine the angular acceleration of the circuit if its moment of inertia is 10 ^ -6 kg * m ^ 2.

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