A sound wave having a wavelength of 20 cm is travelling in water. If the velocity of sound in water is $1600 m s^{- 1}$ then, find the frequency of the sound wave.

9000 Hz

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8000 Hz

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7000 Hz

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1600 Hz

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Solution

The correct option is B
8000 Hz

Given, speed of wave, $v = 1600 m s^{- 1}$
Wavelength, $λ = 20 c m = 0.2 m$
Speed of wave is the product of frequency and Wavelength.
$v = f λ$
$\Rightarrow f = \frac{1600}{0.2} = 8000 Hz$
Therefore, the frequency of sound wave is $8000 Hz$ .

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A sound wave having a wavelength of 20 cm is travelling in water. If the velocity of sound in water is 1600 ms−1 then, find the frequency of the sound wave.

The correct option is B 8000 Hz Given, speed of wave, v=1600 ms−1 Wavelength, λ=20 cm=0.2 m Speed of wave is the product of frequency and Wavelength. v=fλ ⇒f=16000.2=8000 Hz Therefore, the frequency of sound wave is 8000 Hz.

A sound wave having a wavelength of 20 cm is travelling in water. If the velocity of sound in water is $1600 m s^{- 1}$ then, find the frequency of the sound wave.

The correct option is B
8000 Hz

Given, speed of wave, $v = 1600 m s^{- 1}$
Wavelength, $λ = 20 c m = 0.2 m$
Speed of wave is the product of frequency and Wavelength.
$v = f λ$
$\Rightarrow f = \frac{1600}{0.2} = 8000 Hz$
Therefore, the frequency of sound wave is $8000 Hz$ .