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प्रश्न
When a tuning fork, struck by a rubber pad, is held over a length of the air column in a tube, it produces a loud sound for a fixed length of the air column. Name the above phenomenon. How does the frequency of the loud sound compare with that of the tuning fork? State the unit for measuring loudness.
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उत्तर
Resonance frequency of loud sound is either equal to or an integer multiple of the natural frequency of tuning fork. Decibel.
संबंधित प्रश्न
In the diagram below, A, B, C, D are four pendulums suspended from the same elastic string PQ. The lengths 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.
- Name the type of vibrations taking place in pendulums B and D.
- What is the state of pendulum C?
- State the reason for the type of vibrations in pendulums B and C.
When a troop crosses a suspension bridge, the soldiers are asked to break steps. Explain the reason.
Which characteristic of sound makes it possible to recognize a person by his voice without seeing him?
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.
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.
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Explain free and forced vibrations. Give an experimental arrangement to illustrate the phenomenon of resonance.
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
