Question

A circular ring of radius 1m carries a current of 2 A. If the magnetic field at the centre is nu, what is the value
of n.​

Answer 1

r = 1 m

i = 2A

magnetic field at centre (B) = nu

Formula: B = u•i/2r

or, nu = 4×3.14 ×10^-7 / 2×1

or,nu= 6.28×10^-7

or, n = 6.28×10^-7 /u