JEE Advanced | 2013Heat TransferHard
Question
Two rectangular blocks, having identical dimensions, can be arranged either in configuration I or in configuration II as shown in the figure. One of the blocks has thermal conductivity k and the other 2k. The temperature difference between the ends along the x-axis is the same in both the configurations. It takes 9s to transport a certain amount of heat from the hot end to the cold end in the configuration I. The time to transport the same amount of heat in the configuration II is :-
Options
A.2.0 s
B.3.0 s
C.4.5 s
D.6.0 s
Solution
; 
in configuration 1 ; equivalent R = 3R
in configuration 2 ; equivalent
; 
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