COMEDK 2025 Evening Shift | Waves Question 1 | Physics

The fundamental frequency of sound produced in an open pipe of length $\mathbf{L}_1$ is same as the frequency of the $3^{\text {rd }}$ harmonic of the sound produced in the closed pipe of length $\mathbf{L}_2$ Then the ratio of $\frac{L_1}{L_2}$ is :

$\frac{L_1}{L_2}=\frac{3}{1}$

$\frac{L_1}{L_2}=\frac{1}{3}$

$\frac{L_1}{L_2}=\frac{2}{3}$

$\frac{L_1}{L_2}=\frac{3}{2}$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

An open pipe is in second harmonic with frequency $f_1$. One end of the tube is closed and frequency is increased to $f_2$ and it resonates again with nth harmonic. For what value of n , the ratio of $\frac{f_1}{f_2}$ is $\frac{4}{5}$ ?

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

The number of possible natural oscillations of air column in a pipe closed at one end of length $$85 \mathrm{~cm}$$ whose frequencies lie below $$1250 \mathrm{~Hz}$$ are (velocity of sound $$=340 \mathrm{~ms}^{-1}$$)

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

A tuning fork of unknown frequency produces 4 beats with tuning fork of frequency $$310 \mathrm{~Hz}$$. It gives the same number of beats on filing. The initial frequency of a tuning fork is

620 Hz

306 Hz

314 Hz

310 Hz

COMEDK Subjects