NEET UG 2025 · Physics · Question 45
NEET 2025 Physics, question 45
Question 45 of the NEET 2025 paper (code 45) is a Physics question from Waves. Its idea, Open Organ Pipe Harmonics, was asked 3 times, in 2018, 2023 and 2025, across NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q45 · Physics
A pipe open at both ends has a fundamental frequency in air. The pipe is now dipped vertically in a water drum to half of its length. The fundamental frequency of the air column is now equal to :
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Official answer: option 2 · NTA final answer key
Same idea
Open Organ Pipe Harmonics, in other papers
NEET asked this idea 3 times, in 2018, 2023 and 2025. The other 2 questions below.
- 2023 Q14The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is :One-line MCQ · Easy
- 2018 Q2The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ…Numerical · Medium
Open Organ Pipe Harmonics: every question and how it was framed
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.