MCQ
Magnetic field at the centre $O$ due to the given structure is
- A$\frac{\mu_0 l}{4 R}\left[\frac{3}{2}+\frac{1}{\pi}\right] \odot$
- B$\frac{\mu_0 I}{2 R}\left[3+\frac{1}{\pi}\right] \otimes$
- ✓$\frac{\mu_0 I}{4 R}\left[\frac{3}{2}+\frac{1}{\pi}\right] \otimes$
- D$\frac{\mu_0 l}{4 R}\left[3+\frac{2}{\pi}\right] \odot$
