1.

The radius of a current carrying coil is ′R′. Then, the ratio of magnetic fields at the centre of the coil and at an axial point, which is R√3 distance away from the centre of the coil is

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The radius of a current carrying coil is R. Then, the ratio of magnetic fields at the centre of the coil and at an axial point, which is R3 distance away from the centre of the coil is



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