| 1 |
Sound is a type of energy. |
- A. Electrical
- B. Mechanical
- C. Thermal
- D. Chemical
|
| 2 |
Which things are transparent objects. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
| 3 |
The light from the sun reaches on the earth |
- A. 5 min
- B. 8 min
- C. 10 min
- D. 15 min
|
| 4 |
Light travels. |
- A. In straight line
- B. In the form of wave
- C. From time to time
- D. In the form of zig zag
|
| 5 |
The speed of sound through water. |
- A. 340 meter per second
- B. 1500 meter per second
- C. 5000 meter per second
- D. 500 meter per second
|
| 6 |
The speed of sound through air. |
- A. 340 meter per secod
- B. 1500 meter per second
- C. 5000 meter per second
- D. 500 meter per second
|
| 7 |
Speed oflight travels is one second. |
- A. 200,000 km
- B. 300,000 km
- C. 400,000 km
- D. 500,000 km
|
| 8 |
Which object reflect maximum light. |
- A. White paper
- B. Coloured paper
- C. Mirror
- D. Brick wall
|
| 9 |
Sound is produced by |
- A. Vibrating object
- B. Transparent object
- C. Opaque object
- D. Translucent object
|
| 10 |
How does light travel in air. |
- A. In a circle
- B. Along curved path
- C. Along a straight line
- D. In dispersed path
|
