| 1 |
Which things are transparent objects. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
| 2 |
Sound is a type of energy. |
- A. Electrical
- B. Mechanical
- C. Thermal
- D. Chemical
|
| 3 |
Speed oflight travels is one second. |
- A. 200,000 km
- B. 300,000 km
- C. 400,000 km
- D. 500,000 km
|
| 4 |
Which object reflect maximum light. |
- A. White paper
- B. Coloured paper
- C. Mirror
- D. Brick wall
|
| 5 |
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
|
| 6 |
____________ light is the reiurs of light when it hits as opaque surface. |
- A. Refraction
- B. Reflection
- C. Dis persion
- D. Echo
|
| 7 |
Which things are not transparent objects. |
- A. wood
- B. Metal
- C. Stone
- D. All of these
|
| 8 |
Speed of sound is maximum in |
- A. A metal wire
- B. Air
- C. Water
- D. Vacuum
|
| 9 |
Tissue paper allows it to pass through |
- A. Complete light
- B. Some part of light
- C. Special light
- D. Inadequste light
|
| 10 |
Which thing is not bright. |
- A. Book
- B. Candle
- C. Bulb
- D. Sun
|
