Question

Which of the following statements is true about convection?

• A. In solids, heat is transferred only by convection.
• B. Convection occurs in cold liquids.
• C. Convection requires a medium for transmission.
• D. Heat flows from the cold end to the hot end in a substance.

Answer 1

The correct option is C

Convection requires a medium for transmission.

Convection is the process by which heat transfer takes place by the actual movement of molecules. It primarily occurs in fluids. Convection occurs by the movement of particles from the hotter region to the cooler region. For example, boiling water, the heat transfer from the burner to the water occurs through convection.