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प्रश्न
A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :
विकल्प
sound will be louder but pitch will not be different
sound will be louder and the pitch will also be higher
sound will be louder but pitch will be lower
both loudness and pitch will remain unaffected
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उत्तर
By pressing the key gently and then again by, some force, increasing the amplitude of the wave, but the frequency remains the same.
(a) Sound will be louder, but pitch will not be different.
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संबंधित प्रश्न
What is sound and how is it produced?
Can sound travel through vacuum?
What is the general name of the waves consisting of :
(a) compressions and rarefactions?
(b) crests and troughs?
Which object is vibrating when the following sounds are produced?
(i) The sound of a sitar
(ii) The sound of a tabla
(iii) The sound of a tuning fork
(iv) The buzzing of a bee or mosquito
(v) The sound of a flute
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?
The region in a sound wave, with higher pressure and density, is called ______ and that with low pressure and density is called ______.
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 |
Write the answer in your own words.
What is meant by vibration?
Sound is produced by ______.
What is vibration?
