What is thermal steady state ?

Constant temperature of ends are T_(1) and T_(2) (where T_(1)gtT_(2) ) for a conducting rod of 'L' length and cross-sectional area A. What would be the rate of heat transfer in thermal steady state ?

''Conduction stops once rod achieves thermal steady state.''

Two rods, one of iron and another of aluminium of equal length and equal cross-sections are connected with each other. The free end of the iron rod is kept at 100" "^(@)C and the free end of aluminium rod is kept at 0" "^(@)C . If thermal conductivity of aluminium is four times that of iron, find the temperature of their contact surface in the thermal steady state.

What is the temperature of the steel-copper junction is the steady state of the system shown in figure. Length of the steel rod = 15.0 cm, length of the copper rod = 10.0 cm, temperature of the furnace =300^(@)C , temperature of the other end =0^(@)C . The area of cross section of the steel rod is twice that of the copper rod. (Thermal conductivity of steel =50.2" Js"^(-1)m^(-1)K^(-1) , and copper =385" Js"^(-1)m^(-1)KJ^(-1) ).

What is thermodynamic state equation ?

In thermal steady state of rod, temperature gradient is 5^(@) C/cm and temperature of its hot end is 100^(@)C , then at . . . . . . cm distance from hot end its temperature becomes 60^(@)C .

In the circuit shown in figure potential difference between the points A and B in the steady state is

What is thermal expansion ? Write only its types.

What is the temperature of the steel - copper junction in the steady state of the system shown in Fig. Length of the steel rod = 15.0 cm, length of the copper rod = 10.0 cm, temperature of the furnace =400" "^(@)C , temperature of the other end =0" "^(@)C . The area of cross section of the steel rod is twice that of the copper rod. (Thermal conductivity of steel =50.2" J s"^(-1)m^(-1)K^(-1), and of copper =385" J s"^(-1)m-1" "K^(-1) ).