| 1 |
Speed of sound is maximum in |
- A. A metal wire
- B. Air
- C. Water
- D. Vacuum
|
| 2 |
Which thing is not bright. |
- A. Book
- B. Candle
- C. Bulb
- D. Sun
|
| 3 |
Which things are transparent object. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
| 4 |
Which things are transparent objects. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|
| 5 |
Which of the following object in luminous. |
- A. Book
- B. Candle
- C. Bulb
- D. Sun
|
| 6 |
Non -illuminated object that are illuminated by heating are called. |
- A. Transparent object
- B. Opaque object
- C. Burning object
- D. Semi transparent
|
| 7 |
____________ light is the reiurs of light when it hits as opaque surface. |
- A. Refraction
- B. Reflection
- C. Dis persion
- D. Echo
|
| 8 |
Sound is produced by |
- A. Vibrating object
- B. Transparent object
- C. Opaque object
- D. Translucent object
|
| 9 |
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
|
| 10 |
The light from the sun reaches on the earth |
- A. 5 min
- B. 8 min
- C. 10 min
- D. 15 min
|
