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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A wire is bent into the shape shown in fig and the magnetic field is measured at P1 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 P2 when the current is again I. If the total length of wire is the same in each case, what is the ratio of B1/B2 ?

A wire is bent into the shape shown in fig and the magnetic field is measured at P1 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 P2 when the current is again I. If the total length of wire is the same in each case, what is the ratio of B1/B2 ?

determine the magnetic field at centre O . For the arrangement shown in figure