nursing AIIMS BSc Nursing 2025 Mock Test Series Physics Moving Charges and Magnetism Magnetic Field on the Axis of a Circular Current Loop
The magnetic field at a distance 's' along the axis from the centre of a circular current carrying coil of radius 'a' is
1
\(B = \frac{μ_0}{4}\frac{Ia^2}{(s^2+2a^2)^{3/2}}\)
2
\(B = \frac{μ_0}{2\pi}\frac{Ia^2}{(s^2+a^2)^{1/2}}\)
3
\(B = \frac{μ_0}{2}\frac{Ia^2}{(s^2+a^2)^{3/2}}\)
4
\(B = \frac{μ_0}{2}\frac{Ia}{(s^2+a^2)^{2/3}}\)