Home
Class 12
PHYSICS
The outer faces of a rectangular slab ma...

The outer faces of a rectangular slab made of equal thickness of iron and brass are maintained at `100^(@)C` and `0^(@)C` respectively. The temperature at the interface is (Thermal conductivity of iron and brass are 0.2 and 0.3 respectively)

A

`100"^(@)C`

B

`40^(@)C`

C

`50^(@)C`

D

`70^(@)C`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

The outer face of a rectangular slab of equal thickness of iron and brass are maintained at 100^(@)C and 0^(@)C , respectively. Find the temperature of the interface. The conductivities of iron and brass are 14 and 126 Wm^(-1) K^(-1) respectively.

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

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.

+2.0 -0.0 An engineer joined a rod in which 50 cm is copper and 100 cm is steel from end to end together. Both have the circular cross-section with diameter 3 cm. If the free end of copper and steel are maintained at the temperature 100°C and 0°C respectively. Determine the temperature of the copper-steel junction. (Assume the thermal conductivity of copper and steel are 386 J/m - 5-°C. 46 J/m - 5-°C respectively) 50 cm 100 cm 100°C Copper Steel 0°C

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

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. When steady state condition is reached everywhere, which of the following statement is true?

A composite wall of area A is made of equal thickness of lead and iron having thermal conductivities K and 2K, respectively. The temperature on the two sides of the composite wall are 100^(@)C and 0^(@)C with the layer on the hotter side. Calculate the steady -state temperature of the lead-iron interface.

Two rods of similar area of cross section and length are joined as shown in the figure. The ratio of their thermal conductivity is 2:3. The free ends are maintained at 100^(@)C and 0^(@)C respectivley. THE temperature at junction in steady state is

Three rods of copper, brass and steel are welded togeher to from a Y -shaped structure. Area of cross-section of each rod =4 cm^(2) . End of copper rod is maintained at 100^(@)C whereas the ends of brass and steel are at 0^(@)C . Lengths of copper, brass and steel rods are 46, 13 and 12 cm respectively. The rods are thermally insulated from surroundings except at ends. Thermal conductivities of copper, brass and steel are 0.92, 0.26 and 0.12 CGS units respectively. Rate of heat flow through copper rod is