The rate of conductivity of heat is same for all metals.

STATEMENT-1: When water is heated by a burner in metallic container its level first decreases then increases. STATEMENT-2: Thermal conductivity of metal is very compared to water.

Find the rate of heat flow through a cross section of the rod shown in figure (theta_(2)gttheta_(1)) . Thermal conductivity of the material of the rod is K.

Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K_(1) and K_(2) and cross sectional areas A_(1) and A_(2) respectively. If the rate of heat conduction in 1 is four times that in 2, then

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

A thermal conductor is heated at one end. What is the theoretical value of its thermal conductivity in order that the other end also attains the same temperature?

Rate of conduction of impulse will be faster in case of

Two rods of same length and areas of cross section A_1 and A_2 have their ends at same temperature. If K_1 and K_2 are their thermal conductivities, C_1 and C_2 their specific heats and rho_1 and rho_2 are their densities, then the condition that rate of flow of heat is same in both the rods is

The temperatures versus time graph is shown in figure. Which of the substance A,B and C has the lowest heat capacity if heat is supplied to all of them at equal rates.

A cylindrical metallic rod in thermal contact with two reservation of heat at its two ends conducts an amount of heat Q in time t . The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod when placed in thermal contact with the two reservation in time t?

Give Reason Conducting wires are made of metals.