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प्रश्न
A string stretched between its ends is made to vibrate by placing the stem of a vibrating tuning fork at its one end. State three ways how you will increase the frequency of note produced by the string.
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उत्तर
(i) By decreasing the vibrating length of the string,
(ii) By increasing the tension on the string,
(iii) By decreasing the radius of the string.
संबंधित प्रश्न
Why is a loud sound heard at resonance?
In following figure shows A, B, C and D are four pendulums suspended from the same elastic string XY. Lengths of pendulum A and D are equal, while the length of pendulum B is smaller and the pendulum C is longer. The pendulum A is set into vibration.
(a) what is your observation? (b) Give reason for your observation.
When a troop crosses a suspension bridge, the soldiers are asked to break steps. Explain the reason.
The diagram below shows three different modes of vibration P, Q and R of the same string of a given length.
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 |
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| P | Q | R |
- Which vibration will produce a louder sound and why?
- Which vibration will produce sound of maximum shrillness (or pitch) and why?
- What is the ratio of wavelength of vibrations P and R?
What do you mean by resonance? When does resonance occur?
Explain a tuning fork (vibrating) is held close to ear. One hears a faint sound. The same vibrating tuning fork is placed on table, such that its handle is in contact with table, one hears a loud sound.
What do you understand by free vibrations of a body? Draw a displacement-time graph to represent them. Given one example.
