The thermal conductivity of a material in CGS system is 0.4. In steady state, the rate of flow of heat 10 cal/sec-cm, then the thermal gradient will be

The thermal conductivity of a material in CGS system is 0.8. In steady state, the rate of flow of heat 20 cal/s-cm^2', then the thermal gradient will

In the steady state, the rate of flow of heat through any section of a metal bar 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.

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

Rate of normal flow of heat in Searle's method for thermal conductivity is

Thermal conductivity of any matter is 0.50 cal//sec.cm^@C . convert it into "watt"//m^@C .

A cylinder of radius R is surrounded by a cylindrical shell of inner radius R and oputer radius 2R. The thermal conductivity of the material of the inner cylinder is k_(1) and that of the outer cylinder is K_(2) ,Assumming no loss of heat , the effective thermal conductivity of the system for heat flowing along the length of the cylinder is :

The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all in the ratio 1 : 2 are maintained at the same temperature difference, if the rate of flow of heat in the larger rod is 4 cal/ sec, the rate of flow of heat in the shorter rod will be

The ends of the two rods of different materials with their lengths, diameters of cross-section and thermal conductivities all in the ratio 1 : 2 are maintained at the same temperature difference. The rate of flow of heat in the shorter rod is 1cals^(-1) . What is the rate of flow of heat in the larger rod: