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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 6 April 2024, Shift 2, Physics Q48

Question 48 of 90 in this shift, Physics question 18 of 30, Section A.

The longest wavelength associated with Paschen series is : (Given RH=1.097×107R_H=1.097\times10^7 SI unit)
  1. (1)2.973×10−62.973\times10^{-6} m
  2. (2)1.876×10−61.876\times10^{-6} mOfficial answer
  3. (3)1.094×10−61.094\times10^{-6} m
  4. (4)3.646×10−63.646\times10^{-6} m

Official answer

Option 2

NTA final key.

Chapter
Atoms
Topic
Bohr's Atomic Model
Idea tested
Shortest and Longest Wavelengths

Same idea in other shifts

Asked 3× in all
  1. 7 Apr 2025, Shift 1 · Q43For a hydrogen atom, the ratio of the largest wavelength of Lyman series to that of the Balmer series isEasySingle correct
  2. 3 Aug 2021, Shift 2 · Q23The ratio of shortest wavelength to the largest wavelength in Brackett series of atomic spectra for hydrogen atom is x:25x : 25, where the…MediumNumerical value

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.