A long conducting wire having a current| EMF

JEE MAIN 2023

31-01-23 S2

Question

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:

Select the correct option:

N : n

$n^2: N^2$

$\mathrm{N}^2: \mathrm{n}^2$

n : N

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution