JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 8 April 2024, Shift 1, Physics Q44

Question 44 of 90 in this shift, Physics question 14 of 30, Section A.

A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume

h=6.63\times10^{-34}

J s,

m_e=9.0\times10^{-31}

kg and

m_p=1836

times

m_e

)

(1) $1:1836$ Official answer
(2) $1:\sqrt{1836}$
(3) $1:\frac{1}{1836}$
(4) $1:\frac{1}{\sqrt{1836}}$

Official answer

Option 1

NTA final key.

Chapter: Dual Nature of Radiation and Matter
Topic: Matter Waves
Idea tested: Wavelength from Kinetic Energy

Same idea in other shifts

Asked 4× in all

9 Apr 2024, Shift 1 · Q46A proton, an electron and an alpha particle have the same energies. Their de-Broglie wavelengths will be compared as :EasySingle correct
6 Apr 2023, Shift 1 · Q35The kinetic energy of an electron, $\alpha$ -particle and a proton are given as 4 K, 2 K and K respectively. The de-Broglie wavelength…MediumSingle correct
25 Jul 2021, Shift 1 · Q6What should be the order of arrangement of de-Broglie wavelength of electron ( $\lambda_e$ ), an $\alpha$ -particle ( $\lambda_\alpha$ ) and…EasySingle correct

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.