Q140 / 150 · MHT CET 2007 · Physics
If a full wave rectifier circuit is operating from $50 \mathrm{~Hz}$ mains, the fundamental frequency in the ripple will be
- A$70.7 \mathrm{~Hz}$
- Correct answerB$100 \mathrm{~Hz}$
- C$25 \mathrm{~Hz}$
- D$59 \mathrm{~Hz}$
Solution
For full wave rectifier, ripple frequency
$=2 \times$ input frequency
$$
\begin{array}{l}
=2 \times 50 \\
=100 \mathrm{~Hz}
\end{array}
$$
Note A full wave rectifier consists of two junction diodes, so, its efficiency is twice that of half wave rectifier.
Hence, the correct answer is option: 'B'.