Question

9. A wire in the shape shown in figure carries a cumbur The magnetic field \( B \) at point \( P \) is (a) \( \frac{\mu_{0} i}{\pi d}[2+\sqrt{2}] \) (b) \( \frac{\mu_{0} i}{2 \pi d}[2+\sqrt{2}]^{\prime} \) (c) \( \frac{2 \mu_{0} i}{\pi d}[2-\sqrt{2}] \) (d) \( \frac{\mu_{0} i \sqrt{2}}{\pi d}-\lambda \)