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प्रश्न
What do you understand by free vibrations of a body? Draw a displacement-time graph to represent them. Given one example.
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उत्तर
The periodic vibrations of a body, of constant amplitude and constant frequency; are called free vibrations. The displacement-time graph to represent free vibrations of a body is given in the figure.
Example: A tuning fork vibrating in a vacuum.
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संबंधित प्रश्न
The adjacent diagram shows three different modes of vibrations P, Q and R of the same string.
(i) Which vibration will produce a louder sound and why?
(ii) The sound of which string will have maximum shrillness?
(iii) State the ratio of wavelengths of P and R.
What are forced vibrations?
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.
In following figure shows two tuning forks A and B of the same frequency mounted on two separate sound boxes with their open ends facing each other. The fork A is set into vibration.
- Describe your observation.
- State the principle illustrated by this experiment.
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.
A vibrating tuning fork, held over an air column of a given length with its one end closed, produces a loud audible sound. Name the phenomenon responsible for it and explain the observation.
A tuning fork of frequency 256 Hz will resonate with another tuning fork of frequency:
Explain why stringed musical instruments, like the guitar, are provided with a hollow box.
State two ways in which resonance differs from forced vibrations.
A vibrating tuning fork is placed over the mouth of a burette filled with water. The tap is opened and the water level gradually falls. It is observed that the sound becomes the loudest for a particular length of the air column. What is the name of the phenomenon taking place when this happens? Why does the sound become the loudest?
