An aluminium rod of length 1 m and a steel rod of length 2 m both having same cross-sectional area, are soldered together end-to-end. The thermal conductivity of aluminium rod and steel rod is `200 Js^(-1)m K^(-1)` and `50 Js^(-1) m^(-1) K^(-1)` respectively. The temperatures of the free ends are maintained at 300 K and 500 K. What is the temperature of the junction?

Two rods of same length and cross section are joined along the length. Thermal conductivities of first and second rod are K_(1) and K_(2) . The temperature of the free ends of the first and seconds rods are maintained at theta_(1) and theta_(2) respectively. The temperature of the common junction is

Two rods, one made of copper and the other steel of the same length and cross sectional area are joined together. (The thermal conductivity of copper is 385 J.s^(-1) .m^(-1). K^(-1) and steel is 50 J.s^(-1).m-^(1).K^(-1) .) If the copper end is held at 100^(@)C and the steel end is held at 0^(@)C , what is the junction temperature (assuming no other heat losses) ?

Two rods of same length and cross section are joined along the length. Thermal conductivities of first and second rod are K_1 and K_2 . The temperature of the free ends of the first and second rods are maintained at θ_1 and θ_2 respectively. The temperature of the common junction is

Find the thermal resistance of an aluminium rod of length 20cm and area of cross section 1cm^(2) . The heat current is along the length of the rod. Thermal conductivity of aluminium =200Wm^(-1)K^(-1) .

Find the thermal resistance of an aluminium rod of length 20cm and area of cross section 1cm^(2) . The heat current is along the length of the rod. Thermal conductivity of aluminium =200Wm^(-1)K^(-1) .

Find the thermal resistance of an aluminium rod of length 20cm and area of cross section 1cm^(2) . The heat current is along the length of the rod. Thermal conductivity of aluminium =200Wm^(-1)K^(-1) .

Find the thermal resistance of an aluminium rod of length 0.20 m and area of cross section 1xx10^(-4)m^(2) . The heat current is along the length of the rod. [Thermal conductivity of aluminium =200Wm^(-1)K^(-1) ]

A rod of length 1 m having cross-sectionalarea 0.75 m^(2) ' conducts heat at 6000 Js^(-1) . Then the temperature difference acorss the rod is, if K=200 W m^(-1) K^(-1)

Two rods of length l and 2l thermal conductivities 2K and K are connected end to end. If cross sectional areas of two rods are eual, then equivalent thermal conductivity of the system is .

A bar of copper of length 75 cm and a bar of steel of length 125 cm are joined together end to end . Both are of circular cross - section with diameter 2 cm . The free ends of the copper and steel bars are maintained at 100^(@)C and 0^(@)C respectively . The surface of the bars are thermally insulted . What is the temperature of the copper - steel junction ? What is the heat transmitted per unit time across the junction ? Thermal conductivty of copper 9.2 xx 10^(-2) k cal m^(-1) ""^(@)C^(-1)s^(-1) and that of steel is 1.1 xx 10^(-2)k cal m^(-1)s^(-1) (@)C^(-1) .