Practice questions based on chapter 7 (sound) for class 8

 1. Harsh is a musician,who bring about a change in the pitch of the sound produced by his instruments? Give the likely reason for bringing about such a change.

2. Anshuman is a 'tabla player' , he is playing on the Tabla and produce a sound of a given pitch and loudness. Suggest how he can increase the

A. Pitch of the sound without any significant change in its loudness

B. Loudness of the sound without any significant change in its pitch.

3. The value of a sound is 40 decibel. Find the intensity of the sound, as compared to the intensity of the just audible sound ?

4. We know that the frequency of the female voice in humans is more than the frequency of the male voice. We also know that for sound waves,

Velocity = frequency × wavelength

Can we conclude that the velocity of propagation of the female voice would be more than that of the male voice? If not, how can we understand the above quoted results?

5. Why is the sound of a siren in an ambulance or fire tender different from the horns used by other vehicles? Give reason For your answer.

6. During rainy season ,We See The Lightning before we hear the thunder. Explain it.

7. Floor and ceilings of the Auditorium, and theatres are covered with sound proof tiles. Why we do so?

8. What do you mean by characteristic  of sound? Explain it in detail. 

Is amplitude  is related to loudness of sound in any way? Explain this with suitable example.

9.ram and shyam produces sound of amplitude 3:4 .find loudness of shyam's sound in terms of ram's sound?

10. Is sound produced by a musical instrument is monotone?explain your by giving reason in support of your answer.