MULTIPLE CHOICE QUESTIONS:

MULTIPLE CHOICE QUESTIONS: (MCQ’s) :

1. A wave in slinky travelled to and fro in 5 sec the length of the slinky is 5 m. the velocity of the wave is____.

2. Loud sound can travel a larger distance, due to high ________.

3. We can distinguish between sound having same pitch and loudness, this characteristic of sound is_____ .

4. Speed of sound depends upon ____ .

5. Speed (u), wavelength (l), and frequency (n) of sound are related____ .

6. To hear a distinct echo the time interval between the original sound and the reflected sound must be____.

7. Reverberation of sound is used in ____ .

8. Children under the age of 5 can hear upto ____.

9. Dolphins, bats and propoise use_____.

10. The part of a human ear that converts sound vibrations into electrical signal are ____.

11. The sound produced due to a mixture of several frequencies is called ____.

12. The repeated reflection that results in the persistence of sound is called ___.

13. To hear a distinct sound the time interval between the originated sound and the reflected sound must be at least ___.

14.  A _____is a disturbance that moves through a medium when the particles of the medium set neighbouring particles into motion.

15.  Longitudinal waves need ______for propagation.

16.  The distinct sound heard after reflection of sound from the source is called ___

17.  ______ is used to detect cracks and flaws in metal blocks.

18.  The _____ is used in all the musical instruments which has a long tube like flute to produce a peculiar sound.

19.  _____ is a wave that is created by vibrating objects and propagated through a medium from one location to another .

20.  _____cannot travel in vacuum.

Answers: