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A circular wire loop of radius rr = 16 cmcm is immersed in a uniform magnetic...

A circular wire loop of radius rr = 16 cmcm is immersed in a uniform magnetic field BB = 0.375 TT with its plane normal to the direction of the field.

If the field magnitude then decreases at a constant rate of −1.2×10−2 T/sT/s , at what rate should rr increase so that the induced emf within the loop is zero?

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