Rooms are fitted with ventilators to let the hot air out. What is the phenomenon involved here?

Conduction

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Convection

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Radiation

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Insulation

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Solution

The correct option is B Convection
Warmer air in the room being lighter rises up and escapes through the ventilator. The empty space is then filled up by fresh or cold air coming from the windows/doors. Since transfer of heat is taking place through actual movement of air , hence convection is involved here.

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