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14. waves and sound — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics14. waves and sound1 Mark
MCQ
Which of the following equations represents a travelling wave ?
  • ✓
    $y=A \sin (15 x-2 t)$
  • B
    $y=\operatorname{Ae}^{-x^{2}}(v t+\theta)$
  • C
    $y=A e^{x} \cos (\omega t-\theta)$
  • D
    $y=A \sin x \cos \omega t$
✓

Answer

Correct option: A.
$y=A \sin (15 x-2 t)$
a
$y = F ( x , t )$

For travelling wave $y$ should be linear function of $x$ and $t$ and they must exist as $(x \pm v t)$

$y = A \sin (15 x-2 t) \rightarrow$ linear function in $x$ and $t.$

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