| 1 |
What happens to the thermal conductivity of a wall if its thickness is doubled? |
- A. Become double
- B. Remain the same
- C. Become half
- D. Become one fourth
|
| 2 |
Feathers of bird give good thermal: |
- A. Conduction
- B. Insulation
- C. Convection
- D. None of these
|
| 3 |
Heat is an important form of |
- A. Matter
- B. Energy
- C. Wind
- D. Force
|
| 4 |
If heat Q flows in time 't' through some metal then rate of flow of heat is defined as |
- A. Flow of heat = 2Qt
- B. Flow of heat = Q/t
- C. Flow of heat = t/Q
- D. Flow of heat = Qt
|
| 5 |
____________ from sun are major source of energy on earth. |
- A. Light
- B. Radiation
- C. Both a & b
- D. None of these
|
| 6 |
Room are heated using gas heaters by: |
- A. Conduction only
- B. Convection and radiation
- C. Radiation only
- D. Convection only
|
| 7 |
Water is _________ conductor: |
- A. Best
- B. Bad
- C. Good
- D. Poor
|
| 8 |
Land and Sea breezes are the results of: |
- A. Conduction
- B. Convection
- C. Radiation
- D. Conduction and radiation
|
| 9 |
Example of bad conductor is: |
- A. Wool
- B. Iron
- C. Graphite
- D. Gold
|
| 10 |
A Leslie cube has faces: |
|
