JEE Main 2016PhysicsDual Nature of MatterEasyMCQ

JEE Main 2016Dual Nature of Matter Question with Solution

JEE Main 2016 (10 Apr Online)

Question

A photoelectric surface is illuminated successively by monochromatic light of wavelengths λ anλ2. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, the work function of the surface is :

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Show full solutionCorrect option: A
Correct answer
Ahc2λ

Step-by-step explanation

K.Eλ=hcλ-ϕ

K.Eλ2=hcλ2-ϕ

K.Eλ2=3K.Eλ

  ϕ=hc2λ

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About this question

This is a previous-year question from JEE Main 2016, 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.