Before revision: Lagging current Lagging current can be formally defined as “an alternating current that reaches its maximum value up to 90 degrees later than the voltage that produces it.” This means that current lags the voltage when , the angle of the current sine wave with respect to an arbitrarily chosen reference, is less than , the angle of the voltage sine wave with respect to the same reference.
After revision: Lagging current Lagging current can be formally defined with respect to “an alternating current that reaches its maximum value up to 90 degrees later than the voltage that produces it.” This means that current lags the voltage when , the angle of the current sine wave with respect to an arbitrarily chosen reference, is less than , the angle of the voltage sine wave with respect to the same reference.