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Explain convection and conduction.
Convection:
When a fluid, such as air or a liquid, is heated and moved away from the source, the particles of the air or liquid absorbs heat. Particles of hot surface expand, become less dense, and rises. Such type of heat transfer is called convection. This mechanism is used in cooking while using a convection oven. In a convection oven, fans circulate hot air around food thus the food cook faster than in a non-conventional oven.
Conduction:
The process of transferring heat from the hotter end to the colder end of an object is known as conduction.
Eg: Whenever a utensil is kept on flame it becomes hot and the heat travels from the base of the utensil to its handle.
Updated on: 10-Oct-2022
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