A circular loop of flexible iron wire has an initial circumference of 165.0cm, but its circumference is decreasing at a constant
rate of 12.0cm/s due to a tangential pull on the wire. The loop is in a constant, uniform magnetic field oriented perpendicular to the plane of the loop of magnitude 0.500T. Find the emf induced in the loop, at the instant when 9.0s have passed. And find the direction
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