JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 12 April 2023, Shift 1, Physics Q55

Question 55 of 90 in this shift, Physics question 25 of 30, Section B.

For a certain organ pipe, the first three resonance frequencies are in the ratio of 1:3:5 respectively. If the frequency of fifth harmonic is 405 Hz and the speed of sound in air is 324 ms

^{-1}

the length of the organ pipe is ______ m

Official answer

NTA final key.

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

Same idea in other shifts

Asked 4× in all

30 Jan 2024, Shift 1 · Q54In a closed organ pipe, the frequency of fundamental note is 30 Hz. A certain amount of water is now poured in the organ pipe so that the…HardNumerical value
28 Jun 2022, Shift 2 · Q57A tunning fork of frequency 340 Hz resonates in the fundamental mode with an air column of length 125 cm in a cylindrical tube closed at…MediumNumerical value
27 Aug 2021, Shift 2 · Q25A tuning fork is vibrating at 250 Hz. The length of the shortest closed organ pipe that will resonate with the tuning fork will be…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.