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Three rods A B, B C and B D of same length 7 and cross- sectional area A are arranged as shown. T...
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Three rods A B, B C and B D of same length 7 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 conductivities of A B, B C and B D are K, 2 K and K / 2, respectively. Time after which whole ice will melt is (K=100 cal / m-s^∘C, A=10 cm^2, l=1 m)
(1) 400 s
(2) 600 s
(3) 700 s
(4) 800 s
📌 PHYSICS WALLAH OTHER CHANNELS :
📌 PHYSICS WALLAH SOCIAL MEDIA PROFILES :
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 conductivities of A B, B C and B D are K, 2 K and K / 2, respectively. Time after which whole ice will melt is (K=100 cal / m-s^∘C, A=10 cm^2, l=1 m)
(1) 400 s
(2) 600 s
(3) 700 s
(4) 800 s
📌 PHYSICS WALLAH OTHER CHANNELS :
📌 PHYSICS WALLAH SOCIAL MEDIA PROFILES :
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