Shrinking Loop. A circular loop of flexible iron wire has an initial circumference of 167 , but its circumference is decreasing at a constant rate of 14.0 due to a tangential pull on the wire. The loop is in a constant uniform magnetic field of magnitude 0.500 , which is oriented perpendicular to the plane of the loop. Assume that you are facing the loop and that the magnetic field points into the loop.
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