| 1 |
Dolphins can hear sound underwater from up to ............ away |
- A. 15 km
- B. 20 km
- C. 25 km
- D. 30 km
|
| 2 |
Sound is a form of. |
- A. Energy
- B. Wave
- C. Frequency
- D. intensity
|
| 3 |
Which of the following animals can respond to lowest frequency. |
- A. Cat
- B. Cow
- C. Dog
- D. Dolphin
|
| 4 |
Sound cannot pass through. |
- A. Solid
- B. Liquid
- C. Vacuum
- D. Gasses
|
| 5 |
The wavelength of red colour is. |
- A. 700 nm
- B. 800 nm
- C. 900 nm
- D. 600 nm
|
| 6 |
Speed of sound in water is |
- A. 1000 ms-1
- B. 1500 ms-1
- C. 900 ms-1
- D. 2000 ms-1
|
| 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 |
The speed of sound in air is. |
- A. 100 m/s
- B. 300 m/s
- C. 100 m/s
- D. 330 m/s
|
| 10 |
Which of the following features is the height of the wave from the rest position or mid line. |
- A. Frequency
- B. Wavelength
- C. Amplitude
- D. Pitch
|
