What is the principle by which a cooling system (Radiator) in a motor car works?
- AConduction only
- BConvectionCorrect
- CRadiation only
- DBoth conduction and radiation
Explanation
The correct answer is B because convection is the primary mechanism for heat transfer in a car radiator. In this system, heat is carried away from the engine by a liquid coolant. As the hot coolant flows through the radiator tubes, it transfers heat to the metal fins. Air from outside then flows over these fins, absorbing the heat and carrying it away into the atmosphere. This process of heat transfer through the movement of fluids like liquid and air is known as convection. While conduction and radiation occur in minor amounts, the cooling system is designed specifically to work on the principle of forced convection to maintain the engine temperature.
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