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Question

Heat can be transferred to the inside surface of the walls of the container by which of the above?  

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A

I only

B

I and II only

C

I and III only

D

II only

E

I, II, and III only

Easy

Solution

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Correct option is
C

I and III only

As the candle is burning, it radiates heat in the form of infrared radiation, and also heats the air around it, creating convection currents that reach the inner walls of the container. 
Conduction of heat is not responsible for heating up the inner wall as there is no direct contact between the flame and the inner wall.

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