CBSE 2022 · Region 5 · Set 1 · Q1 · 2 marks
With the help of a circuit diagram, explain briefly how a p-n junction diode works as a half-wave rectifier.
Marking-scheme solution
Circuit Diagram of p-n junction diode as half wave rectifier Explanation of its Working 
When voltage at A is positive, diode is forward biased and it conducts and when voltage at A is negative, diode is reverse biased and it does not conduct, so output is zero.
Alternatively:Semiconductor Electronics: Materials, Devices and Simple CircuitsApplication of Junction Diode as a RectifierUnderstandvery_short_answermedium
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CBSE Class 12 Physics past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.