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A 0.240 m radius, the 570-turn coil is rotated one-fourth of a revolution in 3.45 ms, originally having its plane perpendicular to a uniform magnetic

A 0.240 m radius, the 570-turn coil is rotated one-fourth of a revolution in 3.45 ms, originally having its plane perpendicular to a uniform magnetic field. Find the magnetic field strength needed to induce an average emf of 9400 V.

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