A long conducting wire having a current I following through it is, bent into a circular of N turns. Then it is bent into a circular coil of n turns. The magnetic field is calculated at the centre of coils on both the case. The ratio of the magnetic field in first case to that of second case is:

[JEE Main 2023, 31 Jan (Shift 2)]

Question

A long conducting wire having a current I following through it is, bent into a circular of N turns. Then it is bent into a circular coil of n turns. The magnetic field is calculated at the centre of coils on both the case. The ratio of the magnetic field in first case to that of second case is:

[JEE Main 2023, 31 Jan (Shift 2)]

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