Laws electricity
Ohm, Kirchhoff, Coulomb. 4 tools.
Coulomb's lawThe force between two point charges: the formula, the constant, a worked example, and how it compares with gravity at the same distance.Kirchhoff's lawsKirchhoff's current and voltage laws explained with worked examples, the sign conventions that trip people up, and how to use them to solve a circuit.Ohm's lawOhm's law in all its rearranged forms, the power equations that come with it, worked examples, and the cases where the law does not actually hold.Voltage dividerHow two resistors split a voltage, the formula, why loading ruins the result, and the practical rule for choosing divider resistor values.