A circular coil (950 turns, radius 5 0.060 m) is rotating

Chapter , Problem 21

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A circular coil (950 turns, radius 5 0.060 m) is rotating in a uniform magnetic fi eld. At t 5 0 s, the normal to the coil is perpendicular to the magnetic fi eld. At t 5 0.010 s, the normal makes an angle of f 5 45 with the fi eld because the coil has made one-eighth of a revolution. An average emf of magnitude 0.065 V is induced in the coil. Find the magnitude of the magnetic fi eld at the location of the coil.

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