Physics X I Sound

1. Which of the following represents Longitudinal waves: a) Sound waves b) Light waves c) Radio waves d) X-rays

2. The Earthquake are the example of: a) Infrasonic waves b) Shock waves c) Ultrasonic waves d) Audible waves

3. One sone at 1000 hz is equal to: a) 40 db b) 60 db c) 30 db d) 100db

4. Decibel is the unit of: a) Intensity Level b) Wave length c) Speed of waves d) Frequency

5. The speed of sound is highest in: a) Gas b) Solid c) Liquid d) Vacuum

6. The voice of two persons having the same pitch and loudness can be recognized due to the characteristics of the sound known as: a) Quality b) Frequency c) Intensity d) Beats

7. The maximum number of beat that can be detected by human ear is: a) 7 b) 5 c) 9 d) 3

8. Longitudinal waves are also called as: a) Compressional waves b) Mechanical waves c) Transverse waves d) Radio waves

9. In compressional waves the layer of medium having reduced pressure is called: a) Rarefaction b) Node c) Elasticity d) Compression

10. Sound waves can not propagate through: a) Vacuum b) Walls c) Grass d) Wool

11. Velocity of sound increases with the: a) Increase in Viscosity of medium b) Increase in pressure c) Surface area d) Depth of medium

12. The pitch of the sound depends on: a) Frequency b) Wave length c) Intensity d) Velocity

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