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Question

The amount of heat flow through a body by conduction is

चालन द्वारा किसी पिंड से प्रवाहित ऊष्मा की मात्रा है

A.

Directly proportional to the surface area of the body

B.

Directly proportional to the temperature difference on the two faces of the body

C.

Dependent upon the material of the body

D.

All options are correct

Answer ( Option D)

All options are correct

Solution

The amount of heat flow through a body is directly proportional to the surface area of the body, directly proportional to the temperature difference on the two faces of the body and it depends upon the material of the body.

We can identify this by the help of Fourier’s law of conduction

In this equation we can observe that

            

Heat flows directly proportional to area

Heat flow is directly proportional to temperature difference

  

Heat flow is directly proportional to thermal conductivity

Hence, the correct option is (D).

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