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प्रश्न
Name the three modes of transfer of heat.
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उत्तर
There are three modes of transfer of heat (i) Conduction (ii) Convection (iii) Radiation.
- Conduction: “Is that mode of transfer of heat, when heat travels from hot end to cold end from particle to particle of the medium, without actual movement of particles.”
- Convection: “Is a process of transfer of heat by actual move-ment of the medium particles.”
- Radiation: “Is that mode of transfer of heat in which heat directly passes from one body to the other body without heating the medium.”
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संबंधित प्रश्न
Fill in the blank
Heat is a form of _______.
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
Draw a labelled diagram of a thermo flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.
What will absorb heat?
Steel spoon
What will absorb heat?
Glass
Write scientific reason.
In the cold regions, snow falls in winter.
In the past, people used to rub two wooden pieces together to light fire.
To keep her soup warm Paheli wrapped the container in which it was kept with a woollen cloth. Can she apply the same method to keep a glass of cold drink cool? Give reason for your answer.
Which of the following is true?
On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. why?
