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प्रश्न
How is sound produced? Explain with the help of an example.
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उत्तर
Sound is produced when an object vibrates and produces continuous compression and rarefaction.
Example: The sound of our voice is produced by the vibrations of two vocal cords in our throat caused by air passing through the lungs.
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संबंधित प्रश्न
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
Which of the following cannot transmit sound? Water, Vacuum, Aluminium, Oxygen gas
Name the physical qantity whose SI unit is 'hertz'.
What is the SI unit of frequency?
Name four ways in which sound can be produced.
How does sound from a sound producing body travel through air to reach our ears? Illustrate your answer with the help of a labelled diagram.
A device called oscillator is used to send waves along a stretched string. The string is 20 cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the strings.
(a) what is their wavelength?
(b) what is their frequency
(c) what is their speed?
Which kind of sound is produced in an earthquake before the main shock wave begins ?
How are different sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation?
Match the following:
| Human larynx | Vibrations of metal arms |
| Loudspeaker | Vibrations in air column |
| Jal-Tarang | Vibrations in vocal cords |
| Tuning fork | Vibrations in strings |
| Sitar | Vibrations of screen |
