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प्रश्न
Explain why stringed musical instruments, like the guitar, are provided with a hollow box.
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उत्तर
Stringed instruments are provided with a hollow box so that resonance may take place and a loud sound can be produced.
संबंधित प्रश्न
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.
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.
(i) Define resonant vibrations.
(ii) Which characteristic of sound, makes it possible to recognize a person by his voice without seeing him?
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?
Give two examples of forced vibrations.
When acoustic resonance takes place, a loud sound is heard. Why does this happen? Explain.
Explain why does the rear mirror of a motorbike start Vibrating Violently, at some particular speed of motorbike?
What do you understand by free (or natural) vibrations?
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
