A long cylindrical conductor of radius R carries a current i as shown in the figure.
Channel: Doubtnut
Date: 29/03/2020

A long cylindrical conductor of radius R carries a current i as shown in the figure. The current density J varies across the cross-section as `J = kr^(2)`, where, k is a constant. Find an expression for the magnetic field B at a distance `r (lt R)` from the axis