engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Physics Moving Charges and Magnetism Magnetic Field on the Axis of a Circular Current Loop
The magnetic field at the centre of semi-circular wire carrying current i is
1
\(\frac{\mu_0i}{2r}\)
2
\(\frac{\mu_0i}{4r}\)
3
\(\frac{\mu_0i}{r}\)
4
\(\frac{\mu_0i}{2\pi r}\)