Question

A full-wave rectifier is used to convert $\mathrm{n}-\mathrm{Hz}$ A.C into D.C., then the number of pulses per second present in the rectified voltage is.

• A. $\mathrm{n}$
• B. $\frac{\mathrm{n}}{2}$
• C. $2\mathrm{n}$
• D. $4\mathrm{n}$

Answer 1

The correct option is C

$2\mathrm{n}$

Full-wave rectifier: A full-wave rectifier is a circuit, which converts an AC voltage into pulsating DC voltage, using both half cycles of the applied AC voltage.

Determine the number of pulses per second present in the rectified voltage.

Draw a graph of frequency.

1. Frequency of output signal $=$ frequency of input signal
2. As in the same time period, the same number of waves pass.
3. For example, in $\mathrm{t}=2\mathrm{T}$, the number of waves of the input signal is $2$ and the number of waves of the output signal is $2$.
4. Now, for a full-wave rectifier, every half cycle gives one pulse.
5. So for every cycle, we get $2$ pulses.
6. For $\mathrm{n}$ cycles input, output pulses will be $2\mathrm{n}$.

Hence, option C is the correct answer.