# Physics

posted by
**Chan**
.

Hi! Need help please, thank you.

Question:In a model AC generator, a 498 turn rectangular coil 14.0 cm by 21 cm rotates at 124 rev/min in a uniform magnetic field of 0.65 T.

(a) What is the maximum emf induced in the coil?

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(b) What is the instantaneous value of the emf in the coil at t = (ð/30) s? Assume that the emf is zero at t = 0.

____V

(c) What is the smallest value of t for which the emf will have its maximum value?

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The correct answer is not zero. s