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A 40-loop circular coil has a radius of 10.0 cm. It is placed in a magnetic field so that the field lines from a
parmanent magnet (B) are normal to the area of the coil. If the magnet is brought toward the loop so its
magnetic field varies from 0.2 T to 0.70 T in 2 microsecond, the induced emf through each coil would be
3.95 x 105 v
87.9 x 104 V
2.80 MV
O 7.85 kV

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