More on Electric Potential

This lecture is based on Serway, Sections 25.7-25.8.

When faced with a continuous distribution of charge:
- a line of charge
- a hoop of charge
- a disk of charge
- a sphere of charge
you can determine the electric potential due to that distribution by integrating the simple equation
```
                                /  ke * dQ
        electric potential  =   |  -------
                                /     r
  
```
The key is to find a good way to break up the distribution into little pieces ...

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