DELHI PUBLIC SCHOOL – BOPAL, AHMEDABAD
STD IX
CH – SOUND
PLP WORKSHEET - 2
Answer the following questions:
1. How is sound produced?
2. Define Sound.
3. Define Mechanical Waves.
4. Define Frequency. Mention its SI Unit.
5. Define Wavelength.
6. What is the relation between Frequency and Time period?
7. What is the frequency for Audible sound?
8. The frequency of a source of sound is 100Hz. How many times does it vibrate in a minute?
9. Give one difference between longitudinal and transverse wave.
10. What is the difference between infrasonic waves and ultrasonic waves?
