**An infinite cylinder of radius R has a linear charge density λ. The volume charge density (C/m3) within the cylinder (r≤R) is ρ®=ρ0rR, where ρ0 is a constant to be determined.**

**Answer:**

Consider a section of the cylinder with length x

Then

**An infinite cylinder of radius R has a linear charge density λ. The volume charge density (C/m3) within the cylinder (r≤R) is ρ®=ρ0rR, where ρ0 is a constant to be determined.**

**Answer:**

Consider a section of the cylinder with length x

Then