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UPSC 2010: What is the principle by which a cooling system (Radiator) in a motor car works?
(a)Conduction only
(b)Convection
(c)Radiation only
(d)Both conduction and radiation
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Not attemptedCorrect Answer: (b) Convection
A car radiator rejects engine heat through forced convection: hot coolant circulates through thin tubes while air is driven across the fins, removing heat by convective transfer. Conduction and pure radiation play only minor roles, so option (b) Convection is correct. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-topic-wise-questions-physics-heat-and-temperature/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2010 Science & Technology question?▼
The correct answer is option (b): Convection. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2010, GS Paper 1, as Question 88. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.