Yes After full-wave rectification, there is a forward pulsating wave, and its waveform is the same as the half-wave of sine wave. After shaping, the DC waveform remains unchanged. Sinusoidal alternating current is the voltage and current that changes with time according to the law of sinusoidal function. Because the magnitude and direction of alternating current are constantly changing with time, that is to say, the values of voltage (electromotive force) and current are different at each moment, it is necessary to indicate the positive direction of alternating current circuit in analysis and calculation.