# Calculating Total Charge of an Insulating Solid Cylinder

When dealing with an insulating solid cylinder with a non-uniform charge density, determining the total charge requires integrating the charge density function across the entire volume of the cylinder.

The process starts by considering charges within a single cylindrical shell, specified by a radius range from r to r + dr. The charge within this shell is given by dq = ar^11 * r^2 * dr, where a is the charge density function.

To find the total charge of the cylinder, we integrate this expression from 0 to the radius of the cylinder, denoted as a. This integration process will yield the final total charge Q:

## Q = ∫ar^11 * r^2 * dr, limits: 0 to a

Integrating this expression with the specified limits allows us to determine the total charge present in the insulating solid cylinder with a non-uniform charge density.