JEE Main 2024 — Dual Nature of Matter Question with Solution
JEE Main 2024 (31 Jan Shift 2)
Question
In a photoelectric effect experiment a light of frequency times the threshold frequency is made to fall on the surface of photosensitive material. Now if the frequency is halved and intensity is doubled, the number of photo electrons emitted will be:
Choose an option
Show full solutionCorrect option: C
Correct answer
CZero
Step-by-step explanation
Given, . Now, .
Since i.e. the incident frequency is less than threshold frequency. Hence, there will be no emission of photoelectrons.
Therefore, current and no photo electrons will be emitted.
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This is a previous-year question from JEE Main 2024, covering the Dual Nature of Matter 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.