Electrical Potential in a Non-Uniform Field

Again, the potential at a point is the EPE that 1 Coulomb would have at that point, i.e. the energy that would be transferred if 1 C moved between that point and earth, our zero of potential.

The difference is that potential does not vary uniformly as we move from point to point.

We need only consider a radial field.

Notice the equipotentials become further apart as we move away from the charge. The potential gradient is getting smaller.

Questions 10, 11