JEE Main 2022 — Semiconductors Question with Solution
JEE Main 2022 (26 Jun Shift 2)
Question
The positive feedback is required by an amplifier to act as an oscillator. The feedback here means
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Show full solutionCorrect option: B
Correct answer
BA portion of the output power is returned back to the input.
Step-by-step explanation
When the amplifier connects with positive feedback, it acts as the oscillator. The feedback employed here is positive feedback, this means some amount of the output voltage is given to the input. Hence, the circuit continues its process without any input to the oscillator. The positive feedback is also known as regenerative feedback because the system sustains or regenerates itself without any input source. Hence, the oscillator is nothing but an amplifier with the positive feedback.
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This is a previous-year question from JEE Main 2022, covering the Semiconductors chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.