Electrostatics: Feynman's Physics Explained
The world of stationary charges runs on two simple laws. First, electric field lines start on positive charges and end on negative ones, so the total flux out of a surface tells you the charge inside (Gauss's law). Second, the electrostatic field has no swirl (its curl is zero), which means we can define an electric potential, or voltage. The whole subject of electrostatics lives inside those two statements.
The big idea
All of electrostatics follows from two simple field laws.
Think about it
Voltage is like height on a hill for charges. What does a charge 'roll downhill' toward?
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