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प्रश्न
What are forced vibrations?
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उत्तर
The vibrations of a body which take place under the influence of an external periodic force acting on it, are called the forced vibrations.
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संबंधित प्रश्न
Name the phenomenon involved in tunning a radio set to a particular station
How does the medium affect the amplitude of free/natural vibrations of a body?
In following figure shows two tuning forks A and B of the same frequency mounted on two separate sound boxes with their open ends facing each other. The fork A is set into vibration.
- Describe your observation.
- State the principle illustrated by this experiment.
Name the phenomenon involved in tuning your radio set to a particular station and define it.
Differentiate between the following:
Free and forced vibrations.
A bucket kept under a running tap is getting filled with water. A person sitting at a distance is able to get an idea when the bucket is about to be filled.
(i) What change takes place in the sound to give this idea?
(ii) What causes the change in the sound?
A vibrating tuning fork is placed over the mouth of a burette filled with water. The tap is opened and the water level gradually falls. It is observed that the sound becomes the loudest for a particular length of the air column. What is the name of the phenomenon taking place when this happens? Why does the sound become the loudest?
Explain a person walking past a railway line, in the middle of night hears a ringing sound along with the sound of his footsteps.
