True or False - DC circuits have no lead or lag in current versus voltage.

The assertion that DC circuits have no lead or lag in current versus voltage is accurate because, in a direct current (DC) system, both the voltage and current flow in a constant direction. This means that the phase relationship between current and voltage is fixed. In more technical terms, phase shift occurs in alternating current (AC) systems due to the sinusoidal nature of the waveforms, where current can lead or lag behind the voltage depending on the impedance of the circuit. However, in DC circuits, since the current and voltage remain steady without periodic changes over time, there is no phase difference, thus they are in perfect synchrony. This is why the statement is true.