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A small circular loop of area 2.00 cm2 is placed in the plane of, and concentric with, a large circular loop of radius 1.00 m. The current in the large loop is changed at a constant rate from 200 A to −200 A (a change in direction) in a time of 1.00 s, starting at t = 0. What is the magnitude of the magnetic field
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Fundamentals of Physics, Volume 1, Chapter 1-20
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