Student Login

Home›Chapters›Wave Motion PYQs›Organ Pipes & Resonance Tube›Question 107

NEET 2018 · Organ Pipes & Resonance Tube

Organ Pipes & Resonance Tube question from NEET 2018

Q107NEET 2018Medium

Organ Pipes & Resonance Tube

The 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 pipe is 20 cm, the length of the open organ pipe is

Show answer and solution

Answer: (a)

Open pipe fundamental $\frac{v}{2L_o}$ = closed pipe third harmonic $\frac{3v}{4L_c}$ .
$L_o = \frac{4L_c}{6} = \frac{2}{3} \times 20 = 13.3$ cm
So the answer is (a) 13.2 cm (nearest option).

Report a mistake

More questions on Organ Pipes & Resonance Tube

A tuning fork is used to produce resonance in a glass tube. The length of the air column…NEET 2018
The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz…NEET 2017
A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped…JEE Main 2016
An air column, closed at one end open at the other, resonates with a tuning fork when the…NEET 2016 (Phase 1)
The second overtone of an open organ pipe has the same frequency as the first overtone of…NEET 2016 (Phase 2)
The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second…NEET 2015 (AIPMT, Cancelled Paper)
The number of possible natural oscillations of air column in a pipe closed at one end…NEET 2014 (AIPMT)
A pipe of length 85 cm is closed from one end. Find the number of possible natural…JEE Main 2014