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प्रश्न
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उत्तर
- When one tuning fork is struck, another tuning fork of the same natural frequency starts vibrating. This is sympathetic vibration due to resonance.
- A child on a swing gains more height when pushes are given at intervals matching the natural frequency of the swing. The swing then vibrates with greater amplitude due to resonance.
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संबंधित प्रश्न
Define the resonance phenomenon.
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.
When a troop crosses a suspension bridge, the soldiers are asked to break steps. Explain the reason.
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.
Differentiate between the following:
Light and sound waves.
Differentiate between the following:
Free and forced vibrations.
Differentiate between the following:
Radio waves and light waves.
State two ways in which resonance differs from forced vibrations.
Explain a person walking past a railway line, in the middle of night hears a ringing sound along with the sound of his footsteps.
