Thermal Propert...

The heat is flowing through two cylindrical rods of same material. The diameters of the rods are in the ratio 1 : 2 and their lengths are in the ratio 2 : 1. If the temperature difference between their ends is the same, the ratio of flow of heat through them will be

Two identical square rods of metal are welded end to end as shown in figure(i), 20 calories of heat flows through in 4 minutes. If the rods are welded as shown in figure (ii), the same amount of heat will flow through the rods in

For cooking the food, which of the following type of utensil is most suitable?

The coefficient of thermal conductivity depends upon

When two ends of a rod wrapped with cotton are maintained at different temperatures and after come time every point of the rod attains a constant temperature, then

The ratio of thermal conductivity of two rods of different material id 5:4. The two rods of same area of cross-section and same thermal resistance will have the lengths in the ratio

The thermal conductivity of a material in CGS system is 0.4. In steady state, the rate of flow of heat is 10 cal/s-cm², then the thermal gradient will be

Two rectangular blocks A and B of different metals have same length and same area of cross–section. They are kept in such a way that their cross–sectional area touch each other. The temperature at one end of A is 100^oC and that of B at the other end is 0^oC. If the ratio of their thermal conductivity is 1 : 3, then under steady state, the temperature of the junction in contact will be

Two vessels of different materials are similar in size in every respect. The same quantity of ice filled in them gets melted in 20 minutes and 30 minutes. The ratio of their thermal conductivities will be

In Searle\'s method for finding conductivity of meats, the temperature gradient along the bar