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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
What are forced vibrations?
Give one example to illustrate forced vibrations.
Why is a loud sound heard at resonance?
In fig. , P, Q, R and S represent test tubes each of height 20 cm which are filled with water upto heights of 10 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube Q, a loud sound is heard.
(i) Describe the observations with the tubes P, R and S.
(ii) Give the reason for your observation in each case.
(iii) State the principle illustrated by the above experiment.
In Fig. A, B, C and D are four pendulums suspended from the same elastic string XY. The lengths of pendulum A and D are equal, while the length of pendulum B is shorter and of the pendulum C is longer. Pendulum A is set into vibrations.
- What is your observation about the vibrations of pendulum D?
- Give reason for your observation in part (a).
- What type of vibrations take place in pendulums Band C?
- Give reason for the answer in part (c).
Differentiate between the following:
Light and sound waves.
Explain a person walking past a railway line, in the middle of night hears a ringing sound along with the sound of his footsteps.
Explain Why are stringed musical instruments provided with large sound boxes?
What do you understand by free vibrations of a body? Draw a displacement-time graph to represent them. Given one example.
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
