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प्रश्न
Give two examples of forced vibrations.
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उत्तर
(i) The vibrations produced in the board of a guitar when its string is made to vibrate.
(ii) The vibrations produced in the tabletop when the stem of a vibrating tuning fork is pressed against it.
संबंधित प्रश्न
The diagram above shows a wire stretched over a sonometer. Stems of two vibrating tuning forks A and Bare touched to the wooden box of the sonometer. It is observed that the paper rider (a small piece of paper folded at the centre) present on the wire flies off when the stem of vibrating tuning fork B is touched to the wooden box but the paper just vibrates when the stem of vibrating tuning fork A is touched to the wooden box.
1) Name the phenomenon when the paper rider just vibrates.
2) Name the phenomenon when the paper rider flies off.
3) Why does the paper rider fly off when the stem of tuning fork B is touched to the box?
What are forced vibrations?
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.
How do you tune your radio set to a particular station ? Name the phenomenon involved in doing so and define it.
Name the phenomenon involved in tuning your radio set to a particular station and define it.
In fig. shows two tuning forks P and Q of the same frequency mounted on separate sound boxes with their open ends facing each other. The fork A is set into vibration. (i) Describe your observation. (ii) State the principle illustrated by this experiment.
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.
Explain a person walking past a railway line, in the middle of night hears a ringing sound along with the sound of his footsteps.
