MCQ
A straight conductor carrying a current I, is split into a circular loop of radius r as shown in the figure. The magnetic field at the centre O of the circle, in tesla, is-
- A$\frac{\mu_0 I}{2 r}$
- B$\frac{\mu_0 I}{2 \pi r}$
- C$\frac{\mu_0 I}{\pi r}$
- ✓zero
