| 1 |
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
|
| 2 |
Non -illuminated object that are illuminated by heating are called. |
- A. Transparent object
- B. Opaque object
- C. Burning object
- D. Semi transparent
|
| 3 |
Which things are transparent objects. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
| 4 |
Sound is a type of energy. |
- A. Electrical
- B. Mechanical
- C. Thermal
- D. Chemical
|
| 5 |
Speed of sound is maximum in |
- A. A metal wire
- B. Air
- C. Water
- D. Vacuum
|
| 6 |
Tissue paper allows it to pass through |
- A. Complete light
- B. Some part of light
- C. Special light
- D. Inadequste light
|
| 7 |
Moon is |
- A. Luminous object
- B. Ligh emitting object
- C. Non-luminous object
- D. Opaque object
|
| 8 |
How does light travel in air. |
- A. In a circle
- B. Along curved path
- C. Along a straight line
- D. In dispersed path
|
| 9 |
Which of the following object in luminous. |
- A. Book
- B. Candle
- C. Bulb
- D. Sun
|
| 10 |
The light reflected from the moon resches to earth. |
- A. 2.5 sec
- B. 3.5 sec
- C. 1.5 sec
- D. 0.5 sec
|
