Two metal cubes with 3 cm- edges of copper and aluminium are arranged as shown in figure. Find
(a)the total thermal current from one reservoir to the other
(b) the ratio of the thermal current carried by the copper cube to that carried by the aluminium cube. Thermal conductivity of copper is 401 `W//m.K` and that of aluminium id 237 `W//m.K` .

Two metal cubes with 3 cm-edges of copper and aluminium are arranged as shown in figure. (K_(CU) = 385 W//m-K, K_(AL) = 209 W//m-K) The total thermal current from one reservoir to the other is :

Two metal cubes with 3 cm edges of copper and aluminium are arranged as shown. Thermal conductivities of copper and aluminium are 401 W/m-K and 237 W/m-K.

The ends of a copper rod of length 1m and area of cross-section 1cm^2 are maintained at 0^@C and 100^@C . At the centre of the rod there is a source of heat of power 25 W. Calculate the temperature gradient in the two halves of the rod in steady state. Thermal conductivity of copper is 400 Wm^-1 K^-1 .

The ends of a copper rod of length 1m and area of cross-section 1cm^2 are maintained at 0^@C and 100^@C . At the centre of the rod there is a source of heat of power 25 W. Calculate the temperature gradient in the two halves of the rod in steady state. Thermal conductivity of copper is 400 Wm^-1 K^-1 .

The ends of a copper rod of length 1m and area of cross-section 1cm^2 are maintained at 0^@C and 100^@C . At the centre of the rod there is a source of heat of power 25 W. Calculate the temperature gradient in the two halves of the rod in steady state. Thermal conductivity of copper is 400 Wm^-1 K^-1 .

A copper rod of length 75 cm and an iron rod of length 125cm are joined together end to end . Both are of circular cross section with diameter 2 cm . The free ends of the copper and iron are maintained at 100^@C and 0^@C respectively . The surface of the bars are insulated thermally . The temperature of the copper -iron junction is [Thermal conductivity of the copper is 386.4 W//m-K and that of iron is 48.46W//m-K ].

A copper rod of length 75 cm and an iron rod of length 125cm are joined together end to end . Both are of circular cross section with diameter 2 cm . The free ends of the copper and iron are maintained at 100^@C and 0^@C respectively . The surface of the bars are insulated thermally . The temperature of the copper -iron junction is [Thermal conductivity of the copper is 386.4 W//m-K and that of iron is 48.46W//m-K ].

A copper rod 2 m long has a circular cross-section of radius 1 cm. One end is kept at 100^@C and the other at 0^@C . The surface is insulated so that negligible heat is lost through the surface. In steady state, find (a) the thermal resistance of the bar (b) the thermal current H (c) the temperature gradient (dT)/(dx) and (d) the temperature at a distance 25 cm from the hot end. Thermal conductivity of copper is 401 W//m.K.

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.