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Why is a loud sound heard at resonance ?...

Why is a loud sound heard at resonance ?

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At resonance, the body vibrates with a large amplitude thus conveying more energy to the ears, so a loud sound is heard.
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A student performed the experiment to measure the speed of sound in air using resonance air-column method. Two resonances in the air-column were obtained by lowering the water level. The resonance with the shorter air-column is the first resonance and that with the longer air-column is the second resonance. Then, A. the intensity of the sound heard at the first resonance was more than at the second resonance B. the prongs of the tuning fork were kept in a horizontal plane above the resonance tube C. the ampitude of vibration of the end of the prongs is typically around 1 cm D. the length of the air-column at the first resonance was somewhat than 1//4 th of the wavelength of the sound in air.

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ICSE-SOUND-EXERCISE -7(B)
  1. The diagram in Fig. shows the displacement time graph of a vibrating b...

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  2. The diagram in Fig. shows the displacement time graph of a vibrating b...

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  3. A tuning fork is vibrating in air. State whether the vibrations are na...

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  4. The diagram below shows the displacement-time graph for a vibrating bo...

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  5. What are forced vibrations ? Give one example to illustrate your answe...

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  6. When the stem of a vibrating tuning fork is gently pressed on the surf...

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  7. State two differences between natural and forced vibrations.

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  8. What is meant by Resonance ?

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  9. State the condition for the resonance to occur.

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  10. Complete the following sentence : Resonance is a special case of ........

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  11. State two differences between the forced and resonant vibrations.

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  12. Why is a loud sound heard at resonance ?

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  13. Fig. shows two tuning forks A and B of the same frequency mounted on...

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  14. A vibrating tuning fork, held over an air column of a given length wit...

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  15. In Fig. , A, B, C and D represent the test tubes each of height 20 cm ...

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  16. In Fig. , A, B, C and D represent the test tubes each of height 20 cm ...

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  17. In Fig. , A, B, C and D represent the test tubes each of height 20 cm ...

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  18. Marching soldiers are asked to break their steps while crossing a brid...

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  19. Explain, why stringed musical instruments, like the guitar, are provid...

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  20. How do you tune your radio set to a particular station ? Name the phen...

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