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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 6 April 2023, Shift 1, Physics Q35

Question 35 of 90 in this shift, Physics question 5 of 30, Section A.

The kinetic energy of an electron, α\alpha-particle and a proton are given as 4 K, 2 K and K respectively. The de-Broglie wavelength associated with electron (λe\lambda_e), α\alpha-particle (λα\lambda_\alpha) and the proton (λp\lambda_p) are as follows:
  1. (1)λα>λp>λe\lambda_\alpha>\lambda_p>\lambda_e
  2. (2)λα<λp<λe\lambda_\alpha<\lambda_p<\lambda_eOfficial answer
  3. (3)λα=λp<λe\lambda_\alpha=\lambda_p<\lambda_e
  4. (4)λα=λp>λe\lambda_\alpha=\lambda_p>\lambda_e

Official answer

Option 2

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
  1. 8 Apr 2024, Shift 1 · Q44A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume…EasySingle correct
  2. 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
  3. 25 Jul 2021, Shift 1 · Q6What should be the order of arrangement of de-Broglie wavelength of electron (λe\lambda_e), an α\alpha-particle (λα\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.