Q. The intensity of magnetic field due to an isolated pole of strength m at a point distance r from it will be
A) $\frac{m}{r^{2}}$
B) $mr^{2}$
C) $\frac{r^{2}}{m}$
D) $\frac{m}{r}$
Explanation
(a) The magnetic field (B) due to an isolated pole at a distance r from it is given by
$B = \frac{\mu_{0}}{4\pi}.\frac{m}{r^{2}}$
Where m pole strength.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.