Figure is a graph of induced emf versus time for a coil of N turns rotating with angular speed w in a uniform magnetic field directed perpendicular to the axis of rotation of the coil. Copy this sketch (increasing the scale), and, on the same set of axes, show the graph of emf versus t when(a) The number of turns in the coil is doubled,(b) The angular speed is doubled, and(c) The angular speed is doubled while the number of turns in the coil ishalved.

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E(mV) 10 t(ms) -5 -10