Physics > 2007 > 21
WASSCE
Which of the following statements distinguishes thermal conduction from convection?
I. Conduction requires a material medium while convection does not
II. In convection, there is actual motion of hot material while in conduction, molecules vibrate faster about their mean positions.
III. Conduction takes place in solids while convection takes place in fluids.
I. Conduction requires a material medium while convection does not
II. In convection, there is actual motion of hot material while in conduction, molecules vibrate faster about their mean positions.
III. Conduction takes place in solids while convection takes place in fluids.
A.
I and II only
B.
II and III only
C.
I and III only
D.
I, II and III
Answer: B
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