An AC (alternating current) circuit that consists only of resistive components is commonly referred to as a "resistive AC circuit" or simply a "resistive circuit." In such a circuit, the main element determining the behavior of the circuit is the resistance, and the current and voltage are in phase with each other. This means that the current and voltage waveforms peak and trough at the same time. The impedance in a resistive AC circuit is purely real, meaning it only involves resistance and doesn't have any reactive components like capacitance or inductance.