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A wire is bent into the shape shown in f...

A wire is bent into the shape shown in fig and the magnetic field is measured at `P_1` when the current in the wire is I. The same wire is then formed into the shape shown in the Fig and the magnetic field is measured at point `P_2` when the current is again I. If the total length of wire is the same in each case, what is the ratio of `B_1//B_2` ?

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