JEE Main 2025 January Physics: Waves & Sound – Previous Year Questions
All 3 questions asked from Waves & Sound in JEE Main 2025 January Physics (22, 23, 24, 28 and 29 January, all shifts). This chapter is about 1.2% of the 250 Physics questions in the session: 3 single-correct (MCQ) and 0 numerical-value questions. Select an answer to attempt each question, and open “View solution” under it.
3questions
3MCQ
0numerical
1.2%of Physics paper
Topics asked in this chapter
Sound Waves & Organ Pipes – 2 questions
Wave Motion – 1 question
Sound Waves & Organ Pipes
Q122 Jan 2025 · Shift 1MCQ
A closed organ and an open organ tube are filled by two different gases having same bulk modulus but different densities $\rho_1$ and $\rho_2$, respectively. The frequency of $9^{th}$ harmonic of closed tube is identical with $4^{th}$ harmonic of open tube. If the length of the closed tube is 10 cm and the density ratio of the gases is $\rho_1:\rho_2 = 1:16$, then the length of the open tube is :
A
$\frac{15}{9}$ cm
B
$\frac{20}{9}$ cm
C
$\frac{20}{7}$ cm
D
$\frac{15}{7}$ cm
Q228 Jan 2025 · Shift 1MCQ
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: A sound wave has higher speed in solids than gases.
Reason R: Gases have higher value of Bulk modulus than solids.
In the light of the above statements, choose the correct answer from the options given below
A
Both A and R are true and R is the correct explanation of A
B
Both A and R are true but R is NOT the correct explanation of A
C
A is true but R is false
D
A is false but R is true
Wave Motion
Q323 Jan 2025 · Shift 2MCQ
The equation of a transverse wave travelling along a string is $y(x,t) = 4.0\sin[20\times10^{-3}x + 600t]$ mm, where $x$ is in mm and $t$ is in second. The velocity of the wave is :