AIIMS 2019 Physics Magnetic Field in Toroids MCQ Question

The magnetic field $B$ at the center of a toroid can be calculated using the formula $B = \frac{{\mu N I}}{{2 \pi r}}$, where $\mu$ is the permeability, $N$ is the number of turns, $I$ is the current, and $r$ is the radius. Substituting the given values, $B = \frac{{700 \times 250 \times 1.5}}{{2 \pi \times 0.005}} \approx 10.5 \, \text{T}$, confirming option B as correct. Other options are incorrect as they do not match this calculated value, indicating either miscalculations or incorrect application of the formula.