Electricity and Magnetism covers current, voltage, resistance, circuits and magnets.
Key formulae
$V = IR$ (Ohm's Law) · Power $P = VI$
Current is measured in amperes (A), voltage in volts (V), resistance in ohms (Ω). Like magnetic poles repel; unlike poles attract.
Remember
- $V = IR$ · $P = VI$.
- Like poles repel; unlike poles attract.