| 1 |
The rate at which various surface absorb heat depends upon: |
- A. Nature of surface
- B. Nature of liquid
- C. Radiation
- D. Emission & absorption
|
| 2 |
The radiation from sun is: |
- A. Alpha
- B. Gamma
- C. Radio
- D. Ultraviolet
|
| 3 |
Wood, cork,cotton, wool , rubber are the examples of: |
- A. Conductor
- B. Thermal conductor
- C. Insulator
- D. Both a & b
|
| 4 |
The sun's surface temperature is : |
- A. 3,000 K
- B. 3,030 k
- C. 6,000 K
- D. 600 K
|
| 5 |
Land breeze from land to sea during: |
- A. Day
- B. Night
- C. Afternoon
- D. Morning
|
| 6 |
Convection of heat is the process of heat transfer due to the: |
- A. Random motion of molecules
- B. Downward movement of molecules
- C. Upward movement of molecules
- D. Free movement of molecules
|
| 7 |
Land and Sea breezes are the results of: |
- A. Conduction
- B. Convection
- C. Radiation
- D. Conduction and Radiation
|
| 8 |
Metals are good conductor of heat due to: |
- A. Free electrons
- B. Reamain same
- C. Small size of their molecules
- D. Rapid vibration of their atoms
|
| 9 |
The brids stretch out their wings and circle in the rising currents of hot air called |
- A. conduction
- B. convection
- C. radiation
- D. thermals
|
| 10 |
The insulator of heat is: |
- A. Cork
- B. Cotton
- C. Wood
- D. All
|