Two rods `A` and `B` are of equal lengths. Their ends of kept between the same temperature and their area of cross-section are `A_(1)` and `A_(2)` and thermal conductivities `K_(1)` and `K_(2)`. The rate of heat transmission in the two rods will be equal, if

Two rods A and B are of equal lengths. Their ends are kept at the same temperature difference and their area of cross - sections are A_(1) and A_(2) and thermal conductivities k_(1) and k_(2) . The rate of heat transmission in two rods will be equal, if . . . .. . .

Two different metal rods of the same length have their ends kept at the same temperature theta_(1) , and theta_(2) with theta_(2) gt theta_(1) . If A_(1) and A_(2) are their cross-sectional areas and K_(1) and K_(2) their thermal conductivities, the rate of flow of heat in the two rods will be the same it:

Two different metal rods of equal lengths and equal areas of cross-section have their ends kept at the same temperature theta_(1) and theta_(2) . if K_(1) and K_(2) are their thermal conductivities, rho_(1) and rho_(2) their densities and S_(1) and S_(2) their specific heats, then the rate of flow of heat in the two rods will be the same if:

One end of a thermally insulated rod is kept at a temperature T_1 and the other at T_2 . The rod is composed of two sections of length l_1 and l_2 and thermal conductivities K_1 and K_2 respectively. The temperature at the interface of the two section is

One end of a thermally insulated rod is kept at a temperature T_1 and the other at T_2 . The rod is composed of two sections of length l_1 and l_2 and thermal conductivities K_1 and K_2 respectively. The temperature at the interface of the two section is

Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K_(1) and K_(2) and cross sectional areas A_(1) and A_(2) respectively. If the rate of heat conduction in 1 is four times that in 2, then

Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K_(1) and K_(2) and cross sectional areas A_(1) and A_(2) respectively. If the rate of heat conduction in 1 is four times that in 2, then