Sound — Important Questions
Gujarat Board · Class 9 · Science
44 important questions from Sound for Gujarat Board Class 9 Science, with answers. Includes multiple choice and multiple correct questions.
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Important Questions from Sound
Which of the following can act as a medium for sound propagation?
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Air, Water, Steel
Sound can travel through solids (steel), liquids (water), and gases (air). However, sound cannot travel through vacuum as there are no particles to carry the vibrations.
Which characteristics determine the loudness of sound?
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Amplitude
The amplitude of a sound wave determines its loudness. Greater amplitude means louder sound, while smaller amplitude means softer sound.
The pitch of sound depends on:
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Frequency
Pitch depends on frequency. Higher frequency produces higher pitch, and lower frequency produces lower pitch. This is how we distinguish between shrill and deep sounds.
The relationship between speed, frequency, and wavelength of sound is:
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Speed = Frequency × Wavelength
The relationship is v = νλ, where v is speed, ν is frequency, and λ is wavelength. This fundamental wave equation applies to all wave motions.
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