What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?
A series of DC pulses at twice the frequency of the AC input✓Correct answer
A series of DC pulses at the same frequency as the AC input
A sine wave at half the frequency of the AC input
A steady DC voltage
Explanation
Both halves of each input cycle produce an output pulse of the same polarity, so two pulses appear per input cycle and the pulse rate is twice the input frequency. Without a filter the output is not steady DC, it still falls to zero between pulses.