Question

# If we place our hand below a lighted electric bulb. We feel warmer because of :

A
convection
B
C
conduction
D
both A and B
Solution
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#### There are three ways by which heat transfers:Conduction: for which the two bodies need to be in contactConvection: for which there needs to be a material medium between the two bodiesRadiation: which occurs if there is a temperature difference, irrespective of whether there is a material medium or not.In this case, there is a medium between the two. But the two bodies are not in contact. Hence, there is radiation and convection which matches with option D.

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