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  4. The Prongs a vibrating tuning fork are immersed in water. Then: (1) amplitude of the waves decreases (2) velocity of the waves decreases (3) frequency of the waves decreases (4) wavelength of the waves increases

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Q. The Prongs a vibrating tuning fork are immersed in water. Then : (1) amplitude of the waves decreases (2) velocity of the waves decreases (3) frequency of the waves decreases (4) wavelength of the waves increases

BHUBHU 2005

Solution:

1. The amplitude of vibration will definitely decrease due to resistance produced by the water medium.
2. The velocity of sound in water is greater than the velocity in air.
3. The frequency is the property of source and hence, does not change.
4. Velocity $=$ frequency $\times$ wavelength so, as velocity increases, wavelength of the waves increases