Four rods of silver, copper, brass and w...

Four rods of silver, copper, brass and wood are of same shape. They are heated together after wrapping a paper on it, the paper will burn first on

Silver

Copper

Brass

Wood

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Three rods of copper, brass and steel are joined together to form T shape as shown in figure. The cross sectional area of each rod is 4cm^(2) the end of copper rod is maintained at 10^(@)C and the ends of brass and steel rods at 0^(@)C assume there is no loss of heat to surrounding. What is temperature of junction point A in .^(@)C

The thermal conductivity of copper is four times that of brass. Two rods of copper and brass of same length and cross-section are joined end to end. The free end of copper rod is at 0^(@)C and that of brass rod at 100^(@)C . Calculate the temperature of junction at equilibrium. neglect radiation losses.

Two rods of copper and brass having the same length and cross - section are joined end to end. The free end of the copper is at 0^(@)C and of brass is at 80^(@)C in steady-state. If thermal conductivity of copper is 4 times of that of brass find the temp. at junction of two rods

Three rods of copper, brass and steel are welded together to form a Y -shaped structure. The cross-sectional area of each rod is 4 cm^2 . The end of copper rod is maintained at 100^@C and the ends of the brass and steel rods at 80^@C and 60^@C respectively. Assume that there is no loss of heat from the surfaces of the rods. The lengths of rods are : copper 46 cm, brass 13 cm and steel 12 cm. (a) What is the temperature of the junction point? (b) What is the heat current in the copper rod? K(copper) = 0.92, K (steel) = 0.12 and K(brass) = 0.26 cal//cm-s^@C .

Three rods of Copper Branss and Steel are welded together to form a Y-shaped structure Area of cross -section of each rod is 4cm^(-2) End of copper rod is maintained at 100^(@)C , where as ends of brass, steel are kept at 0^(@)C Lenths of the copper brass and steel rods are 46,13 andd 12cms respectively The rods are thermally insulated from surroundings except at ends Thermal conductivities of copper, brass and steel are 0.92,0.26 and 0.12 CGS units respectively Rate of heat flow through coper rod is .

Three rods of copper, brass and steel are welded togeher to from a Y -shaped structure. Area of cross-section of each rod =4 cm^(2) . End of copper rod is maintained at 100^(@)C whereas the ends of brass and steel are at 0^(@)C . Lengths of copper, brass and steel rods are 46, 13 and 12 cm respectively. The rods are thermally insulated from surroundings except at ends. Thermal conductivities of copper, brass and steel are 0.92, 0.26 and 0.12 CGS units respectively. Rate of heat flow through copper rod is

Two unifrom brass rod A and B of length l and 2l and radii 2r respectively are heated to the same temperature. The ratio of the increase in the volume of A to that of B is

Four rods made up of glass, plastic, aluminium, an wood are covered with wax at one end. The other ends of these rods are inserted in a container containing hot water The wax on which rod will melt first?

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