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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A small square loop of wire of side l is placed inside a large square loop of wire of side L(L>>l). The loops are co-planer and their centres coincide. What is the mutual inductance of the system ?

A small square loop of wire of side l is placed inside a large square loop of wire of side L(L>>l). The loops are co-planer and their centres coincide. What is the mutual inductance of the system ?

A coil has indutance of 4 mH. If the current through the coil changes from 0.25 amp to 2 amp during 0.5 s find the average voltage dropped across the inductor.