A wire loop of radius 0.50 m lies so that an external magnetic field of magnitud

Question

A wire loop of radius 0.50 m lies so that an external magnetic field of magnitude 0.40 T is perpendicular to the loop. The field reverses its direction, and its magnitude changes to 0.20 T in 1.0 s. Find the magnitude of the average induced emf in the loop during this time.

A wire loop of radius 0.50 m lies so that an external magnetic field of magnitude 0.40 T is perpendicular to the loop. The field reverses its direction, and its magnitude changes to 0.20 T in 1.0 s. Find the magnitude of the average induced emf in the loop during this time.

____mV?

Explanation / Answer

induced emf = rate of change of flux

induced emf = area * (initial magnetic field - final magnetic field) / time

induced emf = pi * 0.5^2 * (0.4 - 0.2) / 1

induced emf = 157.07963267 mV

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