The rate of flow of heat through a single homogeneous solid depends upon____.

The rate of flow of heat through a single homogeneous solid depends upon____.

a. Area of the section parallel to the direction of heat flow
b. Area of the section at right angle to the direction of heat flow
c. Total surface area of the solid
d. None of the above

Correct Answer : b. Area of the section at right angle to the direction of heat flow

Explanation :

Fourier's law of conduction is based upon observation and states. Fourier's law states that the rate of flow of heat through a single homogeneous solid is directly proportional to the area of the section at right angle to the direction of heat flow, and change of temperature with respect to the length of the path of heat flow.