Q. A circular loop of flexible iron wire has an initial circumference of 161, but its circumference is decreasing at a steady rate of 13.0 because of a tangential pull on the wire. The loop is in a steady uniform magnetic field of magnitude 0.600, which is oriented perpendicular to the plane of the loop. Suppose that you are facing the loop and that the magnetic field points into the loop. Determine the magnitude of the emf induced in the loop after exactly time 6 has passed since the circumference of the loop started to reduce.