Radius of current carrying coil is 'R'. ...

Radius of current carrying coil is 'R'. Then ratio of magnetic fields at the centre of the coil to the axial point, which is `Rsqrt(3)` distance away from the centre of the coil :-

`1 : 1`

`1 : 2`

`1 : 4`

`8 : 1`

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