COMEDK 2026 Morning Shift | Waves Question 2 | Physics

The speed of transverse wave in aluminium wire is $\frac{1}{10}$ times the speed of longitudinal wave in the wire. The stress in the wire is (Young's Modulus of Al=10 ${ }^{10} \mathrm{~Pa}$ )

$0.1 P a$

$10^7 \mathrm{~Pa}$

$10^8 \mathrm{~Pa}$

10 Pa

COMEDK 2025 Evening Shift

MCQ (Single Correct Answer)

-0

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 $$=340 \mathrm{~ms}^{-1}$$)

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