A coil formed by wrapping 80 turns of wire in the shape of asquare is positioned in a magnetic field so that the normal to the plane ofthe coil makes an angle of 60.0∘ with the direction of the field. When themagnetic field is increased uniformly from 100 mT to 500 mT in 0.20 s,the emf of magnitude 50.0 mV is induced in the coil. What is the totallength of the wire in the coil?

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A: length (l) = 0.02 m emf induced (E) = 18 mV = 0.018 Vrate of decrease of magnetic field = dAdt = 0.1…

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