In a full wave rectifier circuit operating with 50 Hz mains frequency, the fundamental frequency in the ripple at the output would be
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 100 Hz
A full-wave rectifier uses both halves of each input cycle: one diode conducts in the positive half cycle and the other in the negative half cycle, so the output gets one pulse in every half cycle. The output therefore repeats twice in each input cycle, and the ripple has twice the mains frequency.
\( \displaystyle f_{\mathrm{ripple}} = 2f = 2 \times 50\,\mathrm{Hz} = 100\,\mathrm{Hz} \)
Note: This question is from NCERT (2026-27). NTA sets numerical questions from NCERT too, so do not ignore NCERT while practising numericals.
NCERT (2026-27):
Exercises – …
