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प्रश्न
Write true or false for a given statement.
A sound is a form of energy.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
On what factor does the loudness of a sound depend ?
Fig. shows three ways in which a string of length l in an instrument can vibrate.
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| (i) | (ii) | (iii) |
- Which of the diagram shows the principle note?
- Which vibration has the frequency four times that of the first?
- Which vibration is of the longest wavelength?
- What is the ratio of the frequency of the vibration in (i) and (ii)?
Define the term amplitude of a wave. Write its S.I. unit.
How is sound perceived by us?
State the relation between the wavelength and the frequency.
The distance between three consecutive crests of wave is 60 cm. If the waves are produced at the rate of 180/ min, calculate:
- wavelength
- time period
- wave velocity.
Can you hear each other in a dark room?
Define one hertz.
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
Draw a curve showing density or pressure variations with respect to distance for a disturbance produced by sound. Mark the position of compression and rarefaction on this curve. Also, define wavelengths and time periods using this curve.
