Properties of Sound — task. Physics CBSE Live product, Class 9 (2026-27).

Choose the correct answer:

1. Which of the following correctly represents the relationship between the speed \(v\), wavelength \(\lambda\), and frequency \(\nu\) of a sound wave?

\(v=\frac{\nu}{\lambda}\)
\(v=\frac{1}{\nu\lambda}\)
\(v=\lambda + \nu\)
\(v=\lambda \nu\)

2. A sound wave travels through air at a constant speed. If the frequency of the sound wave is increased, what will happen to its wavelength?

It will increase because wavelength is directly proportional to frequency.
It will remain unchanged because frequency does not affect wavelength.
It will decrease because speed remains constant and \(v=\lambda\nu\).
It will become zero because the frequency has increased.

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1. Properties of Sound

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