JEE Mains 2023, Physics Solutions, 31st Jan 2023, Shift 2, Evening Session: 3 PM - 6 PM, Q6

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

(1) N : n (2) n^2 : N^2
(3) N^2 : n^2 (4) n : N

Joint Entrance Examination January 2023, JEE Mains 2023, Physics Solutions, 31st Jan 2023, Shift 2, Evening Session: 3 PM - 6 PM, Question 6, Physics, Magnetic Field

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