Q. A coil having $N$ turns carry a current $I$ as shown in the figure. The magnetic field intensity at point $P$ is
A) $\frac{\mu_{0}\ NIR^{2}}{2\left( R^{2} + x^{2} \right)^{3/2}}$
B) $\frac{\mu_{0}NI}{2R}$
C) $\frac{\mu_{0}NIR^{2}}{(R + x)^{2}}$
D) Zero
Explanation
The correct answer is Option A: $\frac{\mu_{0}\ NIR^{2}}{2\left( R^{2} + x^{2} \right)^{3/2}}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.