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Question
Why is a loud sound heard at resonance?
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Solution
At resonance, the body vibrates with a large amplitude, conveying more energy to the ears, resulting in a loud sound.
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RELATED QUESTIONS
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.
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?
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.
When a body vibrates under a periodic force, the vibrations of the body are ______.
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.
State two ways in which resonance differs from forced vibrations.
What do you understand by forced vibrations?
