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Waves

JEE Main level, single correct, medium

130 of 142

Question 130 of 142

Given below are two statements: one is labelled as Assertion A and the other is labelled as
Reason $\mathbf{R}$
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

Show answer and solution

Answer: (B) $\mathbf{A}$ is true but $\mathbf{R}$ is false

Speed of sound in a medium depends on inertial and elastic properties as

v=\sqrt{\frac{B}{P}}

for gases and

v=\sqrt{\frac{Y}{P}}

for solids. Since the elastic property of solid happens to be many folds greater than that of gases, the speed of sound in solids i5 higher than in gases.

Also, bulk modulus of gases varies between 0 and

\infty\left(B=-v \frac{d P}{d v}\right)

hence reason is false.

JEE Main question paper PDF

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JEE Main 2025 Apr 2 Shift 1 question paper

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JEE Main Physics practice question on Waves (Speed of Sound Waves), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.