Which of the following mode of heat transfer involves movement of particles?

Mixed convection

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Free convection

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Forced convection

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All of the above

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Solution

The correct option is D All of the above
Free convection or natural convection is the mode of heat transfer through a fluid (liquid or gas) caused by molecular motion.
Forced convection is a mechanism in which external force or energy to transfer heat from a body.
Mixed convection is the combination of natural convection and forced convection.
So, we can say that in all the three modes of heat transfer involves movement of particles or molecular motion.

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Similar questions

In convection mode of transfer of heat :

Mode of Heat Transfer	Mechanism
1. Conduction	(a) Heat transfer occurs through electromagnetic waves without involving particles.
2. Convection	(b) Transfer of heat through the movement of liquids and gases.
3. Radiation	(c) Heat transfer takes place between objects by direct contact.

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