| 1 |
Which of the followig features of a wave is the number of waves that pass by each second. |
- A. Loudness
- B. Amplitude
- C. Frequncy
- D. Wave speed
|
| 2 |
------------ waves are produced in stretched string. |
- A. Longitudinal wave
- B. Elecromagnetic wave
- C. Transverse wave
- D. None of these
|
| 3 |
Wave are of .............. types. |
- A. Two
- B. Three
- C. Four
- D. Five
|
| 4 |
Speed of sound in water is |
- A. 1000 ms-1
- B. 1500 ms-1
- C. 900 ms-1
- D. 2000 ms-1
|
| 5 |
Dolphins can hear sound underwater from up to ............ away |
- A. 15 km
- B. 20 km
- C. 25 km
- D. 30 km
|
| 6 |
The speed of sound in air is. |
- A. 100 m/s
- B. 300 m/s
- C. 100 m/s
- D. 330 m/s
|
| 7 |
An object produce a sound with a frequency of 50 Hz. Find its tiem period. |
- A. 0.01 sec
- B. 0.03 sec
- C. 0.02 sec
- D. 0.04 sec
|
| 8 |
The lowest pointof a wave is................ |
- A. Crest
- B. Amplitude
- C. Peak
- D. Trough
|
| 9 |
Sound cannot pass through. |
- A. Solid
- B. Liquid
- C. Vacuum
- D. Gasses
|
| 10 |
Sound is a form of. |
- A. Energy
- B. Wave
- C. Frequency
- D. intensity
|
