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The ends of a metal rod are kept at temp...

The ends of a metal rod are kept at temperatures `theta_1` and `theta_2` with `theta_2gttheta_1`. The rate of flow of heat along the rod is directly proportional to

A

the length of the rod

B

the diameter of the rod

C

the cross sectional area of the rod

D

the temperature difference `(theta_2-theta_1)` between the ends of the rod

Text Solution

Verified by Experts

The correct Answer is:
C, D
The rate of flow of heat is given by
`(Q)/(t)=(KA(theta_2-theta_1))/(l)`
Where K is the thermal conductivity. A is the cross sectional area and l the length of the rod. Hence, the correct choices are (c ) and (d).
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