Question

The rods AB, BC and BD of same length and cross-
sectional area a are arranged as shown. The end D is
immersed in ice whose mass is 440 g and is at 0°C. The
end C is maintained at 100°C. Heat is supplied at constant
rate of 200 cal/s. Thermal conductivity's of AB, BC and BD
are K, 2K and K/2, respectively. Time after which whole ice
will melt is
(K = 100cal/m – 2 – °C, A = 10 cm²,1 = 1 m)
A K, 1 B
2K, 7
C
2
ec
100°C
200 cal/s
K/2,1
Ice at 0°C
880066888​

Answer 1

Answer:

The rods AB, BC and BD of same length and cross-

sectional area a are arranged as shown. The end D is

immersed in ice whose mass is 440 g and is at 0°C. The

end C is maintained at 100°C. Heat is supplied at constant

rate of 200 cal/s. Thermal conductivity's of AB, BC and BD

are K, 2K and K/2, respectively. Time after which