A magnetic fi eld is passing through a loop of wire whose
Chapter , Problem 27(choose chapter or problem)
A magnetic fi eld is passing through a loop of wire whose area is 0.018 m2 . The direction of the magnetic fi eld is parallel to the normal to the loop, and the magnitude of the fi eld is increasing at the rate of 0.20 T/s. (a) Determine the magnitude of the emf induced in the loop. (b) Suppose that the area of the loop can be enlarged or shrunk. If the magnetic fi eld is increasing as in part (a), at what rate (in m2 /s) should the area be changed at the instant when B 5 1.8 T if the induced emf is to be zero? Explain whether the area is to be enlarged or shrunk.
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