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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveEquation/Relation between Displacement & excess pressureMedium3 minQB

PhysicsMediummultiple choice

Passage / Comprehension

The figure represents the instantaneous displacement-position graph of a longitudinal harmonic wave travelling along the negative $x$ -axis. Identify the correct statement related to the movement of the points shown in the figure.

The points moving in the direction of the wave are:

Options:(select one or more)

Answer:

A, B

Solution:

Particle velocity:
$V_{p} = - V_{ω} \frac{d s}{d x}$
Here $V_{ω} < 0$ (wave in $- x$ direction).
$V_{p} < 0$
requires slope:
$\frac{d s}{d x} < 0$
At b slope negative, at c slope negative, at f positive, at i zero.
Hence points b and c.
Printed key: A,B.

Subject:PhysicsTopic:Sound WaveSubtopic:Equation/Relation between Displacement & excess pressure

⏱ 3mℹ️ Source: QB

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