PPT Slide

Calculating Electric Potentials

Calculate the potential V(r) at the point shown (r<a)

• Look at last term:

• Line integral from “a” to “r”, again has to be positive, pushing against a force.
  • But this time the force doesn’t vary the same way, since “r’” determines the amount of source charge

• What’s left to do?

• ADD THEM ALL UP!

• Sum the energies

This is the charge that is inside “r” and sources field

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