Which of the following cylindrical rods will conduct most heat, when their ends are maintained at the same steady temperature

Which of the following rods made of same material will conduct more heat in given time when their ends are maintained at the same temperature difference .

Which of the following cylindrical rods of the same metal has the highest rate of flow of heat ? The rods have equal difference of temperature between their ends :

Heat is flowing through two cylindrical rods made of same materials whose ends are maintained at similar temperature. If diameters of the rods are in ratio 1:2 and lengths in ratio 2:1 , then the ratio of thermal current through them in steady state is:

Rate of heat flow through two conducting rods of identical dimensions having thermal conductivities K_(1) and K_(2) and Q_(1) and Q_(2) when their ends are maintained at the same difference of temperature individually. When the two rods are joined in series with their ends maintained at the same temperature difference (as shown in the figure), the rate of heat flow will be

Rate of heat flow through two conducting rods of identiclal dimensions having thermal conductivities K_(1) and K_(2) and Q_(1) and Q_(2) when their ends are maintained at the same difference of temperature individually. When the two rods are joined in series with their ends maintained at the same temperature difference (as shown in the figure), the rate of heat flow will be

The ratio of radii of two cylindrical rods of same material is 2 : 1 and ratio of their lengths is 2 : 3. Their ends are maintained at same temperature difference. If rate of flow of heat in the longer rod is 2 Cal s^(-1) , then that in the shorter rod will be

Which of the following circular rods, (given radius r and length l) each made of the same material and whose ends are maintained at the same temperature will conduct most heat?