The coil of the generator shown in the figure is turned withconstant angular vel

Question

The coil of the generator shown in the figure is turned withconstant angular velocity. The emf induced in the coil therefore

A)is constant.
B)is zero. We need a changing angular velocityto produce an emf.
C)varies sinusoidally.
D)causes a current to flow through the coilwhich produces a field always pointing from the south to the northpole of the magnet.

The coil of the generator shown in the figure is turned withconstant angular velocity. The emf induced in the coil thereforeA)is constant. B)is zero. We need a changing angular velocityto produce an emf. C)varies sinusoidally. D)causes a current to flow through the coilwhich produces a field always pointing from the south to the northpole of the magnet.

Explanation / Answer

C)varies sinusoidally. magnetic flux =BAcos(t + ) emf = -d/dt= BAsin(t + )

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