JEE Main 10 Jan 2019 Shift 1 Solved Paper

An insulating thin rod of length l has a x linear charge density p(x) = ρ0

x

l

on it. The rod is rotated about an axis passing through the origin (x = 0) and perpendicular to the rod. If the rod makes n rotations per second, then the time averaged magneticmoment of the rod is :