A) Conduction
B) Convection
C) Radiation
D) In all these heat is transferred with the same speed
Correct Answer: C
Solution :
Key Idea: Process is fastest where medium is not required. There are three modes of heat transfer conduction, convection and radiation. Out of which the process of conduction and convection require a medium for propagation while the process of radiation is done in vacuum also with speed of light, hence speed of transfer of heat is maximum in it.
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