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When the emf of a rotating coil is at its peak value, what is true of the flux through the coil?
AIt equals the peak emf
BIt is half its maximum
CIt is momentarily zero
DIt is at its maximum
Answer & Solution
Correct answer: C. It is momentarily zero
Peak emf occurs when sin wt is plus or minus 1, so cos wt is zero and the flux momentarily vanishes.
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