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प्रश्न
No medium is required for transfer of heat by the process of ______.
उत्तर
No medium is required for transfer of heat by the process of radiation.
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संबंधित प्रश्न
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
Select the correct alternative
Heat in a liquid is transferred by
Select the correct alternative
The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
Why is the freezing chest in a refrigerator fitted near its top?
Give one example of heat transfer by radiation.
How does a fever get lowered by putting a cold compress on the forehead of a patient?
Match the items in column-I to the items in column-II
| Column-I | Column-II | ||
| 1. | Linear expansion | (a) | change in volume |
| 2. | Superficial expansion | (b) | hot body to cold body |
| 3. | Cubical expansion | (c) | 1.381 X 10-23 JK-1 |
| 4. | Cubical expansion | (d) | change in length |
| 5. | Boltzmann constant | (e) | change in area |
Heat is the transfer of energy between two objects at different temperatures.
Wrap a thin paper strip tightly around an iron rod. Try to burn the paper with candle while rotating the iron rod continuously. Does it burn? Explain your observation.
