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प्रश्न
(i) Define resonant vibrations.
(ii) Which characteristic of sound, makes it possible to recognize a person by his voice without seeing him?
उत्तर
(i) When the natural frequency of vibration becomes equal to the frequency with which the object is vibrating, the object will have maximum amplitude. This is called resonant vibration.
(ii) Timber or quality of sound.
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संबंधित प्रश्न
Define the Resonance phenomenon?
Give one example to illustrate forced vibrations.
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.
Name the phenomenon involved in tuning your radio set to a particular station and define it.
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 ?
Differentiate between the following:
Free and forced vibrations.
Explain why stringed musical instruments, like the guitar, are provided with a hollow box.
Explain a tuning fork (vibrating) is held close to ear. One hears a faint sound. The same vibrating tuning fork is placed on table, such that its handle is in contact with table, one hears a loud sound.
What do you understand by forced vibrations?
