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प्रश्न
Select the correct alternative
The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
पर्याय
conduction only
convection only
radiation only
conduction and convection
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उत्तर
conduction and convection
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संबंधित प्रश्न
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.
Write true or false for a given statement.
Medium is necessary for the transfer of heat by radiation.
Fill in the blank
Heat transfer in solids is by ______
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
Select the correct alternative
In the process of convection, heat travel
State the direction of heat transfer by way of convection.
Give one example of heat transfer by radiation.
______ of heat does not require a medium.
Why are the houses in Rajasthan painted white?
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 |
