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## Homework Statement

I have a disc with radius R. One half has the charge density of +2σ and the other half has −σ. The task is to find the total charge of the disc.

## Homework Equations

dQ=ρ2πr^2 I would use this equation if the charge density was uniform

## The Attempt at a Solution

My first idea was to split the disc in the middle and find the total charge of each part separately and then add them up. Thinking about it now, this solution feels wrong. What is the correct solution?