engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Physics Moving Charges and Magnetism Magnetic Field on the Axis of a Circular Current Loop
An arc of a circle of radius \(R\) subtends an angle \(\dfrac{\pi}{2}\) at the centre. It carries a current \(i\). The magnetic field at the centre will :
1
\(\dfrac{\mu_{0}i}{2R}\)
2
\(\dfrac{\mu_{0}i}{8R}\)
3
\(\dfrac{\mu_{0}i}{4R}\)
4
\(\dfrac{\mu_{0}i}{5R}\)