<p>(a) In the figure given below the input waveform is converted into the output waveform by a device &lsquo;X&rsquo;. Name the device and draw its circuit diagram.</p>

<p><img alt="" src="https://school.achievam.com/upload/questionbank/question/que_1758501774.jpg" style="height:100px; width:420px" /></p>

<p>(b) In a half-wave rectifier, if the input AC frequency is 50 Hz, what is the frequency of the output waveform?</p>