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Friday, 9 October

JEE Main Physics · Waves

Resonance in Air Columns in JEE Main

Resonance in Air Columns (Physics, Waves) came 6 times in 6 of the 42 JEE Main shifts Lumi analysed, across 5 distinct ideas. 4 of them came in 2024–26; it was last asked in 2025.

Questions
6
in 6 shifts
Ideas asked
5
1 asked more than once
Numerical answer
4
67% of its questions
Pattern
Comes in cycles
last asked 2025
Questions each year
0240’171’201’210’220’233’241’250’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 2Medium 4Hard 0

Format

  • Numerical value4 Q
  • Single correct2 Q
Ideas inside the topic
5 ideas
Where it sits

Part of Waves, which had 27 questions in all. Resonance in Air Columns accounts for 22% of them. In Lumi's JEE taxonomy it belongs to Waves and SHM.

Every question

All 6 Resonance in Air Columns questions

Newest first, each with its options and official answer.

  1. 3 Apr 2025, Shift 2 · Q35In the resonance experiment, two air columns (closed at one end) of 100 cm and 120 cm long, give 15 beats per second when each one is…MediumSingle correct
  2. 6 Apr 2024, Shift 2 · Q51Two open organ pipes of lengths 60 cm and 90 cm resonate at 6th6^{\text{th}} and 5th5^{\text{th}} harmonics respectively. The difference of…EasyNumerical value
  3. 8 Apr 2024, Shift 1 · Q54A closed and an open organ pipe have same lengths. If the ratio of frequencies of their seventh overtones is (a−1a)\left(\frac{a-1}{a}\right)…MediumNumerical value
  4. 31 Jan 2024, Shift 1 · Q49The fundamental frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe. If length of the open…EasySingle correct
  5. 16 Mar 2021, Shift 2 · Q30A closed organ pipe of length L and an open organ pipe contain gases of densities ρ1\rho_1 and ρ2\rho_2 respectively. The compressibility…MediumNumerical value
  6. 8 Jan 2020, Shift 1 · Q23A one metre long (both ends open) organ pipe is kept in a gas that has double the density of air at STP. Assuming the speed of sound in…MediumNumerical value