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A small square loop of wire of side l is placed inside a large square loop of wire of side `L(Lgtgtl)`. The loops are co-planer and their centres coincide. The mutual inductance of the system is proportional toA. `l/L`B. `(l^(2))/L`C. `L/l`D. `(L^(2))/l` |
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Answer» Correct Answer - B `phi=Mi` `(4mu_(0)i)/(4pi(L//2))[1/(sqrt(2))+1/(sqrt(2))]xxl^(2)=Mi` `M=(2sqrt(2) mu_(0)l^(2))/(piL)` `M prop (l^(2))/L` |
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