Line Charge and Charged Cylindrical Shell

[whizadi]

Homework Statement

1. Homework Statement

An infinite line of charge with linear density λ = 7.5 μC/m is positioned along the axis of a thick insulating shell of inner radius a = 2.9 cm and outer radius b = 4.9 cm. The insulating shell is uniformly charged with a volume density of ρ = -612 μC/m3.

What is λ2, the linear charge density of the insulating shell?

Homework Equations

The Attempt at a Solution

 

[kuruman]

What are the relevant equations? How do you think you should approach this problem?