A composite metal bar of uniform section is made up of length 25 cm of copper, 10 cm of nickel and 15 cm of aluminium. Each part being in perfect thermal contact with the adjoining part. The copper end of the composite rod is maintained at `100^(@)"C"` and the aluminium end at `0^(@)"C"`. The whole rod is covered with belt so that there is no heat loss occurs at the sides. If `K_(Cu) = 2K_(Al)" and" " K"_(Al) = 3"K"_(Ni)`, then what will be the temperatures of `Cu- Ni` and `Ni -Al` junctions respectively

A composite bar of uniform cross-section is made of 25 cm of copper, 10 cm of nickel and 15 cm of aluminium with perfect thermal contacts. The free copper end of the rod is at 100^(@)C and the free aluminium ends is at 0^(@)C . If K_(Cu)=2K_(Al)" and "K_(Al)=3K_(Ni) , then the temperatures of Cu-Ni and Ni-Al junctions are respectively. (Assume no loss of heat occurs from the sides of the rod, K-thermal conductivity).

A large cylindrical rod of length L is made by joining two identical rods of copper and steel of length ((L)/(2)) each. The rods are completely insulated from the surroundings. If the free end of copper rod is maintained at 100^(@)C and that of steel at 0^(@)C then the temperature of junction is (Thermal conductivity of copper is 9 times that of steel)

A composite rod of uniform cross-section has copper and aluminium sections of the same length in good thermal contact. The ends of the rod, which is well-lagged, are maintained at 100^(@)C and at 0^(@)C as shown in the diagram (Figure-4.33). The thermal conductivityof copper is twice that of aluminium. Which one of the following graphs represents the variation of temperature T with x along the rod in the steady state ?

Assume that the thermal conductivity of copper is twice that of aluminium and four times that of brass. Three metal rods made of copper, aluminium and brass are each 15 cm long and 2 cm in diameter. These rods are placed end to end, with aluminium between the other two. The free ends of the copper and brass rods are maintained at 100^@C and 0^@C respectively. The system is allowed to reach the steady state condition. Assume there is no loss of heat anywhere. Under steady state condition the equilibrium temperature of the copper aluminium junction will be

Three metal rods made of copper, aluminium and brass, each 20 cm long 4cm in diameter, are placed end to end with aluminium between the other two. The free ends of copper and brass are maintained at 100 and 0^(@)C respectively. Assume that the thermal conductivity of copper is twice that of aluminium and four times that of brass. The approximately equilibrium temperatures of the copper-aluminiu and aluminium-brass junctions are respectively.

Three metal rods made of copper, aluminium and brass, each 20 cm long 4cm in diameter, are placed end to end with aluminium between the other two. The free ends of copper and brass are maintained at 100 and 0^(@)C respectively. Assume that the thermal conductivity of copper is twice that of aluminium and four times that of brass. The approximately equilibrium temperatures of the copper-aluminiu and aluminium-brass junctions are respectively.

One end of a metal rod of length 1.0 m and area of cross section 100cm^2 is maintained at 100° C. If the other end of the rod is maintained at 0°C, the quantity of heat transmitted through the rod per minute is (Coefficient of thermal conductivity of material of rod =100 W/m-K)

A steel bar 10.0 cm long is welded end to end to a copper bar 20.0 cm long. Both bars are insulated perfectly on their sides. Each bar has a square cross-section, 20.00 cm on a side. The free end of the steel bar is maintained at 100^(@)C by placing it in contact with steam, and the free end of the copper bar is maintained at 0^(@)C by placing it in contact with ice. find the temperature at the junction of the two bars and the total rate of heat flow.

The thermal conductivity of copper is four times that of brass. Two rods of copper and brass of same length and cross-section are joined end to end. The free end of copper rod is at 0^(@)C and that of brass rod at 100^(@)C . Calculate the temperature of junction at equilibrium. neglect radiation losses.