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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 The magnetic flux that links the larger loop with the smaller loop of side `l(lltltL)` is `f_(12)=Bl^(2)=(2sqrt(2)mu_(0)Il^(2))/(piL)` `therefore` Mutual inductance `M_(12)=(phi_(12))/(I)=(2sqrt(2)mu_(0))/(pi)((l^(2))/(L))` `i.eM_(12)prop(l^(2))/(L)` `therefore (b)` |
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