Chapter 4 SOUND MCQs

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1. . The velocity of sound in air at 0°C is:





2. . Sound waves are:





3. . The speed of sound is greatest in:





4. . Unit of intensity level of sound is:





5. . Sounds of frequencies higher than 20,000 Hz are called:





6. . The property of sound by which a shrill sound can be distinguished from a grave one is called:





7. . The unit of intensity of sound is:





8. . Ear of a normal human being responds to frequencies between:





9. . For destructive interference of sound waves, the condition for path difference is:





10. . Two tuning forks of frequencies 250 Hz and 252 Hz are sounded together. The number of beats produced is:





11. . The change in pitch due to relative motion between source and listener is called:





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