MCQ
In given hollow cylindrical conductor current density is $J = \frac{J_0}{r^2}$ where $J_0$ is constant and $r$ is the distance from axis of cylinder. If radius of inner surface is $'a'$ and radius of outer surface is $2a$ then find current passed through the conductor.
- A$\pi J_0 ln2$
- ✓$2\pi J_0 ln2$
- C$2\pi J_0$
- D$2\pi J_0 ln3$
