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HC Verma - Concepts of Physics Part 1

16. Sound Waves

1. Introduction to Physics
2. Physics and Mathematics
3. Rest and Motion : Kinematics
4. The Forces
5. Newton’s Laws of Motion
6. Friction
7. Circular Motion
8. Work and Energy
9. Centre of Mass, Linear Momentum, Collision
10. Rotational Mechanics
11. Gravitation
12. Simple Harmonic Motion
13. Fluid Mechanics
14. Some Mechanical Properties of Matter
15. Wave Motion and Waves on a String
16. Sound Waves
17. Light Waves
18. Geometrical Optics
19. Optical Instruments
20. Dispersion and Spectra
21. Speed of Light
22. Photometry

Short Answer

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Objective I

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Objective II

Exercises

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Q. 225.0( 1 Vote )

If the sound leve

Class 11th HC Verma - Concepts of Physics Part 1 16. Sound Waves

Answer :

Given:
Initial sound level
Final sound level

Constant reference intensity

We can find initial intensity using:

⇒

On solving, we get:

Similarly,

On substituting the values and solving, we get:

As the intensity is proportional to the square of pressure amplitude
we have:

∴

Hence, the pressure amplitude is increased by factor.

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