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In a physics laboratory experiment, a coil with 220 turns enclosing an area of 12.6 cm^2 is rotated in a time interval of 4.00×10?2 s from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to the field. The earth's magnetic field at the lab location is 5.4×10?5 T. The total electric flux through the wire before it is rotated is 1.5*10^-5 Wb. What is the average emf induced in the coil?

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