1.

Which among the following is true about conduction, convection and radiation mode of transfer of heat?

A. A Medium is required for conduction but not required for convection and radiation
B. A medium is required for conduction, convection and radiation
C. A medium is required for conduction and convection but not required for radiation
D. A medium is not required for conduction and convectio, radiation
Answer» D. A medium is not required for conduction and convectio, radiation


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