JEE Main 2012 — Structure of Atom Question with Solution
JEE Main 2012 (19 May Online)
Question
If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become
Choose an option
Show full solutionCorrect option: B
Correct answer
Bhalf
Step-by-step explanation
de - Broglie wavelength is given by :
Substituting this in equation (i)
i.e.
when become 4 times wavelength become .
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This is a previous-year question from JEE Main 2012, 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.