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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?
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उत्तर
1) Vibration (The frequency of fork is close to the natural frequencies of vibrating wire).
2) Resonance
3) The paper rider flies off because the natural frequency of vibration of wire matches the frequency of the tuning fork.
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संबंधित प्रश्न
In the diagram below, A, B, C, D are four pendulums suspended from the same elastic string PQ. The length of A and C are equal to each other while the length of pendulum B is smaller than that of D. Pendulum A is set into a mode of vibrations
1) Name the type of vibrations taking place in pendulums B and D?
2) What is the state of pendulum C?
3) State the reason for the type of vibrations in pendulum B and C.
Differentiate between the following:
Free and forced vibrations.
On keeping the stem of a vibrating tuning fork on the surface of a table, a loud sound is heard. Give reason.
What do you mean by resonance? When does resonance occur?
State two ways in which resonance differs from forced vibrations.
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.
What do you understand by free vibrations of a body? Draw a displacement-time graph to represent them. Given one example.
