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 toA. the length of the rodB. the diameter of the rodC. the cross sectional area of the rodD. the temperature difference `(theta_2-theta_1)` between the ends of the rod

The ends of a metal rod are kept at temperatures `theta_1` and `theta_

1.	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 toA. the length of the rodB. the diameter of the rodC. the cross sectional area of the rodD. the temperature difference `(theta_2-theta_1)` between the ends of the rod
Answer» Correct Answer - 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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