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  4. A waveform shown when applied to the following circuit will produce which of the following output waveforms. Assume ideal diode configuration and R1=R2 <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-pzxy0j0mlkkmapkl.jpg />

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Q. A waveform shown when applied to the following circuit will produce which of the following output waveforms. Assume ideal diode configuration and $R_{1}=R_{2}$
Question

NTA AbhyasNTA Abhyas 2022

Solution:

The $PN$ junction will conduct only when it is forward biased i.e. when $-5V$ is fed to it. So, it will conduct only for third-quarter part of the signal shown and when it conducts potential drop $5V$ will be across both the resistors, so output voltage across $R_{2}$ is $2.5V$ .
$\therefore \text{V}_{0} = - 2.5 \text{V}$
When input voltage is $5V$ , $PN$ junction is reversed biased. So, output voltage will be zero at that time.