JEE Main 2022PhysicsAtomic PhysicsEasyMCQ

JEE Main 2022 — Atomic Physics Question with Solution

JEE Main 2022 (25 Jun Shift 1)

Question

The ratio for the speed of the electron in the 3rd  orbit of He+ to the speed of the electron in the 3rd  orbit of hydrogen atom will be :

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Show full solutionCorrect option: D
Correct answer
D2:1

Step-by-step explanation

The speed of electron is given by v=2.18×106×Zn m s-1, where, Z is atomic number and n is number of orbit.

Now, for third orbit, ratio of speed of electron is vHvHe+=ZHZHe+=12

⇒vHe+vH=21

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About this question

This is a previous-year question from JEE Main 2022, covering the Atomic Physics 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.