JEE Main 2024 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 29 January 2024, Shift 1, Physics Q60

Question 60 of 90 in this shift, Physics question 30 of 30, Section B.

When a hydrogen atom going from

n

=2 to

n

=1 emits a photon, its recoil speed is

\frac{x}{5}\ m/s

. Where

x

= ______. (Use, mass of hydrogen atom =

1.6\times10^{-27}

kg)

Official answer

NTA final key.

Chapter: Atoms
Topic: Bohr's Atomic Model
Idea tested: Atom Recoil During Emission

Same topic in other shifts

All Bohr's Atomic Model questions

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.