A very long, solid insulating cylinder with radius
R has a cylindrical hole with radius
a bored along its entire length. The axis of the hole is a distance
b from the axis of the cylinder, where
a<b<R (as shown in figure). The solid material of the cylinder has a uniform has a uniform volume charge density
ρ. Find the magnitude and direction of the electric field inside the hole, and show that this is uniform over the entire hole.
![157637_5cac65f7d5b041f782104b5ed37be5c5.png](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/157637_5cac65f7d5b041f782104b5ed37be5c5.png)