| 1 |
What one of the followig object emit its light. |
- A. Wood
- B. Brick
- C. Sun
- D. Soil
|
| 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 object through which light can pass completely. |
- A. Translucent
- B. Opaque
- C. Semi and opaque object
- D. Transparent
|
| 6 |
Sound is produced by |
- A. Vibrating object
- B. Transparent object
- C. Opaque object
- D. Translucent object
|
| 7 |
____________ light is the reiurs of light when it hits as opaque surface. |
- A. Refraction
- B. Reflection
- C. Dis persion
- D. Echo
|
| 8 |
The speed of sound through Iron. |
- A. 340 meter per second
- B. 1500 meter per second
- C. 5000 meter per second
- D. 500 meter per second
|
| 9 |
Which of the following sounds is called noise. |
- A. Sound of a flute
- B. Rusting of leaves
- C. Pressure horn
- D. Chirping of birds
|
| 10 |
How does light travel in air. |
- A. In a circle
- B. Along curved path
- C. Along a straight line
- D. In dispersed path
|
