Q. A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field, B with the distance d, from the centre of the conductor, is correctly represented by the figure :
A) [image:2019_Q73_opt_a.png]
B) [image:2019_Q73_opt_b.png]
C) [image:2019_Q73_opt_c.png]
D) [image:2019_Q73_opt_d.png]
Explanation
[Solution] Inside, $B \propto d$ (linear rise up to R); outside, $B \propto 1/d$, as in graph (3). Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.