Q. Magnetic intensity for an axial point due to a short bar magnet of magnetic moment $M$ is given by
A) $\frac{\mu_{0}}{4\pi} \times \frac{M}{d^{3}}$
B) $\frac{\mu_{0}}{4\pi} \times \frac{M}{d^{2}}$
C) $\frac{\mu_{0}}{2\pi} \times \frac{M}{d^{3}}$
D) $\frac{\mu_{0}}{2\pi} \times \frac{M}{d^{2}}$
Explanation
(c) $B_{a} = \frac{\mu_{0}}{4\pi}\frac{2M}{d^{3}} = \frac{\mu_{0}}{2\pi}\frac{M}{d^{3\ }}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.