" A metal rod of area of cross section A has length L and coefficient of thermal conductivity K The thermal resistance of the rod is "

If l is the length, A is the area of cross-section and K the thermal conductivity, then the thermal resistance of the block is given by

The thermal conductivity of a rod depends on

The ratio of the coefficient of thermal conductivity of two different materials is 5 : 3 . If the thermal resistance of the rod of same thickness resistance of the rods of same thickness of these materials is same, then the ratio of the length of these rods will be

A wall consists of alternating blocks withlength 'd' and coefficient of thermal conductivity k_(1) and k_(2) . The cross sectional area of the blocks are the same. The equivalent coefficient of thermal conductivity of the wall between left and right is:-

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

Assertion : Greater is the coefficient of thermal conductivity of a material, smaller is the thermal resistance of a rod of that material. Reason : Thermal resistance is the ratio of temperature difference between the ends of the conductor and rate of flow of heat.

The area of cross-section of rod is given by A= A_(0) (1+alphax) where A_(0) & alpha are constant and x is the distance from one end. If the thermal conductivity of the material is K . What is the thermal resistancy of the rod if its length is l_(0) ?