Physics
The sound box of a musical instrument is so constructed that the air column inside it has a natural frequency …………… that of the string stretched in it.
- greater than
- smaller than
- equal to
- cannot say
Sound
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Answer
equal to
Reason — When the natural frequency of the air column inside the sound box matches the frequency of the vibrating string, resonance occurs. This resonance enhances the sound produced by the vibrating string, making it louder and richer.
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Related Questions
A body is vibrating under the influence of an external periodic force of frequency exactly equal to the natural frequency of the vibrations of the body. It executes :
- damped vibrations
- forced vibrations
- resonant vibrations
- natural vibrations
At resonance, a loud sound is heard because the body vibrating with a large …………… sends forth a large amount of energy in the medium.
- amplitude
- frequency
- wavelength
- time period
Column X shows the kind of vibrations and column Y shows their examples.
X Y (A) Natural vibrations (1) A tuning fork when stroked on a rubber pad. (B) Damped vibrations (2) When a guitarist plucks or strums the guitar strings with his/her fingers. (C) Forced vibrations (3) When a troop crosses a suspension bridge. (D) Resonant vibrations (4) A load suspended from a spring. Choose the correct pairing:
(a) A—(4) B—(2) C—(3) D—(1)
(b) A—(4) B—(1) C—(2) D—(3)
(C) A—(4) B—(3) C—(1) D—(2)
(d) A—(2) B—(3) C—(4) D—(1)
A singer can shatter a glass by singing at a particular pitch. The correct reason for the same is :
- The speed of sound is more in glass than in air.
- Glass absorbs the sound waves.
- The frequency of the singer's voice matches the natural frequency of the glass, causing resonance.
- None of the above.