Question

In a full wave rectifier circuit operating from $50Hz$ main frequency, the fundamental frequency in the ripple would be

• A. 25 Hz
• B. 50 Hz
• C. 70.7 Hz
• D. 100 Hz

Answer 1

Answer: (D)

The output waveform of full wave rectifier consists of two pulses of current (or voltage) for each cycle of input voltage.
The ripple frequency at the output of the full wave rectifier is therefore, twice the line frequency.
Given, line frequency $=50Hz$,
therefore, Ripple frequency $=2\times 50=100Hz$