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)`]

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) .

Calculate the thermal resistance of an aluminium rod of length 20cm and area of cross-section 4cm^(2) . The thermal conductivity of aluminium is 210Js^(-1)m^(-1)K^(-1) .

A unifrom steel rod of length 1m and area of cross-section 20 cm^(2) is hanging from a fixed support. Find the increases in the length of the rod.

Calculate the resistance of an aluminium wire of length 50 cmand cross sectional area 2.0mm^(2) . The resistivity of aluminium is (rho)=2.6xx10^(-8)(Omega)m.

Calculate the conductance and conductivity of a wire of radius 0.01 Omega area of cross -section 10^(-4)m^(2) length 0.1m

Find the resistance of a copper coil of total wire-length 10m and area of cross section 1.0mm^(2). What would be the resistance of a similar coil of aluminium? The resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium 2.6xx10^(-8)(Omega).

What is the temperature of the steel -copper junction in the steady state of the system shown in the figure. Length of the steel rod =25cm , length of the copper rod =50cm , temperature of the furance =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 =50Js^(-1)m^(-1)K^(-1) and of copper =400 J s^(-1)m^(-1)K^(-1) )

The ends of copper rod of length 1m and area of cross section 1cm^(2) are maintained at 0^(@)C and 100^(@)C . At the centre of rod, there is a source of heat of 32W . The thermal conductivity of copper is 400W//mK

An aluminium rod and a copper rod of equal length 1.0 m and cross-sectional area. 1cm^(2) are welded together as shown in figure. One end is kept at a temperature of 20^(@)C and the other at 60^(@)C Calculate the amount of heat taken out per second from the hot end. thermal conuctivity of aluminium =200Wm^(-1) ^(@)C^(-1) and of copper =390Wm^(-1) ^(@)C^(-1) .

The heat is flowing through a rod of length 50 cm and area of cross-section 5cm^(2) . Its ends are respectively at 25^(@)C and 125^(@)C . The coefficient of thermal conductivity of the material of the rod is 0.092 kcal // m × s ×.^(@) C . The temperature gradient in the rod is