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प्रश्न
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?
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उत्तर
Resonance in the air column. The frequency of vibrating tuning fork becomes equal to the frequency of vibrating air column. As a result, the amplitude of the sound produced increases. Since loudness is proportional to the square of the amplitude, so the sound is loudest.
संबंधित प्रश्न
How does the medium affect the amplitude of free/natural vibrations of a body?
What are forced vibrations?
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
Why are the stringed instruments like guitar provided with a hollow sound box?
How do you tune your radio set to a particular station ? Name the phenomenon involved in doing so and define it.
Which characteristic of sound makes it possible to recognize a person by his voice without seeing him?
Two pendulums C and D are suspended from a wire as shown in the figure give below. Pendulum C is made to oscullate by displaying it from its mean position. It is seen that D also starts oscillating.
(i) Name the type of oscillation, C will execute.
(ii) Name the type of oscillation, D will execute.
(iii) If the length of D is made equal to C then what difference will you notice in the oscillations of D ?
(iv) What is the name of the phenomenon when the length of D is made equal to C ?
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.
What do you understand by free (or natural) vibrations?
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
