JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 31 January 2024, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

The fundamental frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe. If length of the open pipe is 60 cm, the length of the closed pipe will be:

(1) $60$ cm
(2) $45$ cm
(3) $30$ cm
(4) $15$ cmOfficial answer

Official answer

Option 4

NTA final key.

Chapter: Waves
Topic: Resonance in Air Columns
Idea tested: Open Organ Pipe Harmonics

Same idea in other shifts

Asked 3× in all

6 Apr 2024, Shift 2 · Q51Two open organ pipes of lengths 60 cm and 90 cm resonate at $6^{\text{th}}$ and $5^{\text{th}}$ harmonics respectively. The difference of…EasyNumerical value
8 Apr 2023, Shift 1 · Q51An organ pipe $40\ \mathrm{cm}$ long is open at both ends. The speed of sound in air is $360\ \mathrm{ms^{-1}}$ . The frequency of the…EasyNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.