JEE Main 2022 — Dual Nature of Matter Question with Solution
JEE Main 2022 (28 Jul Shift 2)
Question
Two streams of photons, possessing energies to five and ten times the work function of metal are incident on the metal surface successively. The ratio of the maximum velocities of the photoelectron emitted, in the two cases respectively, will be
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Using Einstein's photoelectric equation,
Maximum kinetic energy, , where, is energy of photon and is work function.
For two cases,
and
Thus, the ratio
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This is a previous-year question from JEE Main 2022, 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.