Final answer:
The rules and equations for direct current circuits apply to alternating current circuits, but with some differences. Ohm's law in AC circuits is written V = I · Z, where V is the amplitude of the voltage, I is the amplitude of the current, and Z is the impedance of the circuit.
Step-by-step explanation:
When dealing with alternating current (AC), the rules and equations for direct current (DC) circuits apply. However, there are some differences. Ohm's law and the equations for power are completely analogous to those for DC, but AC uses rms and average values. So, in AC circuits, Ohm's law is written:
V = I · Z
where V is the amplitude of the voltage, I is the amplitude of the current, and Z is the impedance of the circuit.