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Travelling Sine Wave - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main

Quick Facts

  • Sine wave travelling on string is considered one the most difficult concept.

  • 28 Questions around this concept.

Solve by difficulty

A simple harmonic progressive wave is represented by the equation, y = 8\sin(0.1x -2t), where x\; \&\; y are in cm and t is in second. At any instant the phase difference between two particles separated by 2 cm in x- direction is?

A travelling wave is described by the equation 

y(x, t)=[0.05 \sin (8 x-4 t)] \mathrm{m}

The velocity of the wave is : [all the quantities are in SI unit]

A sine wave is travelling through a string. The relation between particle velocity $\left(V_p\right)$ and wave velocity $(V)$ is given by

The equation of a progressive wave travelling on a string is $y=4 \sin \frac{\pi}{2}\left(8 t-\frac{\pi x}{8}\right) \mathrm{cm}$. The velocity of the wave is

If V is the velocity of the wave and $\omega$ is the angular velocity, then the propagation constant ( K ) of the wave is given by

A sine wave is travelling through a string. At any time instant, two particles on the string are at a distance of $2\lambda$. The phase difference between particle is

Concepts Covered - 1

Sine wave travelling on string

The sine wave or sinusoid is a mathematical function that describes a smooth repetitive oscillation.

$
y(t)=A \sin (\omega t+\phi)
$


Here $\omega$, is the angular frequency i.e,
$\omega=\frac{2 \pi}{T}=2 \pi f {\text { It defines how many cycles of the oscillations are there. }}$
and $\phi=$ phase angle
General form :
a spatial variable $x$ that represents the position on the dimension on which the wave propagates, and a characteristic parameter $k$ called wave number which represents the proportionality between the angular frequency $\omega$ and the linear speed (speed of propagation ) $v$.
which is $y(x, t)=A \sin (k x-\omega t+\phi)$ when the wave is moving towards the right $y(x, t)=A \sin (k x+\omega t+\phi)$ when the wave is moving towards the left.

The wavenumber is related to the angular frequency by:

$
k=\frac{\omega}{v}=\frac{2 \pi f}{v}=\frac{2 \pi}{\lambda}
$


Also,
Particle velocity $=-($ wave velocity $) \times($ slope of $y$ vs $x$ graph $)$

$
\begin{aligned}
& \Longrightarrow V_p=-v\left(\frac{\partial y}{\partial x}\right) \\
& \Longrightarrow \frac{\partial y}{\partial t}=-v\left(\frac{\partial y}{\partial x}\right)
\end{aligned}
$
 

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Sine wave travelling on string

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