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प्रश्न
Select the correct alternative
Heat in a liquid is transferred by
विकल्प
conduction
convection
radiation
conduction and radiation
उत्तर
convection
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Heat transfer in liquids and gases is by ________.
State the direction of heat transfer by way of convection.
Why is the freezing chest in a refrigerator fitted near its top?
Give one example of heat transfer by radiation.
Maximum heat is absorbed by a ______ coloured object.
What are the modes of heat transfer?
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.
When ice changes into a liquid, it absorbs energy.
Take a sheet of paper. Draw a spiral on it as shown in Figure. Cut out the paper along the line. Suspend the paper as shown in Figure above a lighted candle. Observe what happens. Think of an explanation.
