Multiple choice

It is hotter over the top of a fire than at the same distance on the sides because of-

  1. Convection of heat

  2. Conduction of heat

  3. Radiation of heat

  4. Conduction, convection and radiation of hea
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Above a fire, all three heat transfer mechanisms operate: conduction through the combustion zone, convection of hot gases rising upward, and thermal radiation emitted in all directions. The upward convection concentrates heat directly above, while radiation spreads outward, making it hottest directly above.

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