What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

A full-wave rectifier converts the whole of the input waveform to one of constant polarity at its output. It does this by inverting the negative half-cycle of the alternating current (AC) so that both half-cycles flow in the same direction through the load. Because both the positive and the formerly negative half-cycles now appear as consecutive positive pulses, the output waveform consists of two pulses for every single complete cycle of the input AC. Therefore, the frequency of these pulses is exactly twice the frequency of the original AC input. Common distractors include steady DC, which would only occur if a filter capacitor were added to smooth the pulses, and a series of pulses at the same frequency, which describes the output of a half-wave rectifier where the negative half-cycle is simply blocked.