NEET UG 2018 · Physics · Question 24
NEET 2018 Physics, question 24
Question 24 of the NEET 2018 paper (code AA) is a Physics question from Waves. Its idea, Resonance Tube, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 2.
Updated 2026-10-08
Q24 · Physics
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27°C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 27°C is
- 1350 m/s
- 2339 m/sOfficial answer
- 3330 m/s
- 4300 m/s
Official answer: option 2 · CBSE official answer key
Same idea
The only question on Resonance Tube
No other NEET paper from 2017–2026 tested this exact idea.
The chapter
Waves in ten years of NEET
9 questions from 2017–2026, asked in 7 of 10 papers, about 0.9 a paper. Standing Waves, Organ Pipes and Beats alone had 7.