Questions
Two rods of same material, cross-section and length are welded end to end. The temperature difference across the ends of the composite rod is 100°C. 1o cal. of heat flows through the combination in 10 min. If the rods are welded side by side, how much time will 10 cal heat take to go across the combination ?
detailed solution
Correct option is A
Q=KAΔTdt1=K(2A)ΔT(d/2)t2t2=t1/4=10/4=2⋅5 minTalk to our academic expert!
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