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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.
संबंधित प्रश्न
Fill in the blank.
Sound is produced when a body ______.
Describe an experiment to show that each source of sound is a vibrating body.
Explain why you can predict the arrival of a train by placing your ear on the rails without seeing it.
What is the general name of the waves consisting of :
(a) compressions and rarefactions?
(b) crests and troughs?
What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed?
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.
Draw the sketches of two waves A and B such that wave A has twice the wavelength and half the amplitude of wave B.
A sound producing body is at considerable distance from a man. There can be four different media W, X, Y and Z between the sound producing body and the man. The medium X brings the sound to man most quickly whereas medium Z takes the maximum time. The time taken by medium W in bringing sound to man is less than that of X but more than that of Z. The medium Y, however, fails to bring the sound from the sound producing body to the man. Which medium could be the one :
(a) having on fixed shape and no fixed volume?
(b) having a fixed volume but no fixed shape?
(c) having the same composition as that on the moon?
(d) having a fixed shape and a fixed volume?
Different sound notes have different ______.
The substance through which sound is transmitted is called ______.
