JEE Main 2026 — Dual Nature of Matter Question with Solution
JEE Main 2026 (05 April Shift 1)
Question
Light source having wavelength nm is used to generate photo-electrons whose stopping potential is V. The work function of the used metal in the experiment is J. The value of is _____.
( J s, C and m/s)
( J s, C and m/s)
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Using Einstein's photoelectric equation:
The energy of the incident photon is:
J
The maximum kinetic energy of the photoelectrons is:
J
The work function is:
J
Comparing with J, we get .
Answer:
The energy of the incident photon is:
J
The maximum kinetic energy of the photoelectrons is:
J
The work function is:
J
Comparing with J, we get .
Answer:
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This is a previous-year question from JEE Main 2026, 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.