Three conducting rods of same material and cross-section are shown in figure. Temperatures of A,D and C are maintained at `20^(@)C, 90^(@)C and 0^(@)C`. The ratio of lengths BD and BC if there is no heat flow in AB is

Three conducting rods of same material and cross-section are showm in Fig .7(CF).22. Temperatures of A, D and C are maintained at 20^(@)C, 90^(@)C and 0^(@)C . The ratio of the lengths of BC and BD, if there is no flow in AB, is

Two rods of same material and thickness are joined as shown below. The ends X and Y are maintained at X^(@)C and Y^(@)C respectively. The ratio of the heat flow in the two rods is –

In the figure ABC is a conducting rod whose lateral surfaces are insulated. The length of the section AB is one-half of that of BC, and the respective thermal conductivities of the two sections are as given in the figure. If the ends A and C are maintained at 0^(@)C and 70^(@)C respectively, the temperature of junction B in the steady state is

Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The point A and B are maintained at different temperature. Find the ratio of the heat transferred through a cross-section of a semi-circular rod to the heat transferred through a cross section of the straight rod in a given time.

A metal rod of length 2 m has cross sectional areas 2 A and A as shown in figure. The ends are maintained at temperatures 100° C and 70° C . The temperature at middle point C is

Five identical rods are joined as shown in figure. Point A and C are maintained at temperature 120° C and 20° C respectively. The temperature of junction B will be

Six identical cunducting rods are joined as shown in Fig. Points A and D are maintained at temperatures 200^@C and 20^@C respectively. The temperature of junction B will be

Two ends of a conducting rod of varying cross-section are maintained at 200^(@)C and 0^(@)C respectively. In steady state:

Five rods of same material and same cross-section are joined as shown. Lengths of rods ab, ad and bc are l, 2l and 3l respectively. Ends a and c are maintained at temperatures 200^(@)C and 0^(@)C respectivelly. For what length x of rod dc there will be no heat flow through rod bd ?