JEE Main 2018 — Structure Of Atom Question with Solution
From: JEE Main 2018 (Online) 15th April Morning Slot
Question
Ejection of the photoelectron from metal in the photoelectric experiment can be stopped by applying 0.5 V when the radiation of 250 nm is used. The work function of the metal is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B4.5 eV
Step-by-step explanation
= 250 nm = 2500
E = = = 4.96 eV
K. E = 0.5 eV
As, K. E = E 0
0.5 = 4.96
= 4.46 eV 4.5 eV
E = = = 4.96 eV
K. E = 0.5 eV
As, K. E = E 0
0.5 = 4.96
= 4.46 eV 4.5 eV
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This is a previous-year question from JEE Main 2018, covering the Structure Of Atom chapter of Chemistry. 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.