Q. Which of the following graphs represent variation of magnetic field $B$ with distance $r$ for a straight long wire carrying current?
A)
B)
C)
D)
Explanation
(d) $B \propto \frac{1}{r}$
Hence, graph will be a rectangular hyperbola.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.