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Two boys are holding a wire, standing 4 ...

Two boys are holding a wire, standing 4 m apart. The wire sags in the shape of a circular arc with a sag of 1.0 m. The students rotate the wire about the horizontal line connecting their hands, as if they were playing jump rope. The boys rotate the wire at a speed of 4 revolutions per second. The earth’s magnetic field at the location is` 4 xx 10^(– 5)` T. Calculate the rms value of emf developed between the ends of the wire. Assume that the shape of the wire is maintained as it is rotated.

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