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प्रश्न
Name the phenomenon involved in tuning your radio set to a particular station and define it.
उत्तर
The phenomenon involved is resonance. It is a special case of forced vibrations. When the frequency of an externally applied periodic force on a body is equal to its natural frequency, the body rapidly begins to vibrate with an increased amplitude. This phenomenon is known as resonance.
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संबंधित प्रश्न
What are mechanical waves?
How does the medium affect the amplitude of free/natural vibrations of a body?
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
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.
Differentiate between the following:
Light and sound waves.
Differentiate between the following:
Radio waves and light waves.
What do you mean by resonance? When does resonance occur?
When acoustic resonance takes place, a loud sound is heard. Why does this happen? Explain.
What do you understand by free (or natural) vibrations?
