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Question

Which of the following is an example of convection? 

A

The heat of the sun warming our planet

B

The heat from an electric stove warming a frying pan

C

Ice cubes cooling a drink

D

A microwave oven cooking a meal

E

An overhead fan cooling a room

Easy

Solution

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Correct option is
E

An overhead fan cooling a room

Convection is a form of heat transfer where a large number of molecules move from one place to another. An overhead fan works precisely by this method: it sends cooler air molecules down into a hot room, cooling the temperature of the room. The heat of the sun and the cooking action of a microwave are both forms of radiation, while the heat on a frying pan and the cooling action of ice cubes are both forms of conduction.

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