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Q.

Figure shows twelve identical rods made up of same material form a cube. The junctions D and F are maintained at 100°C and 0°C  respectively. In steady state, the temperature of the junction H is
 

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a

30°C

b

60°C

c

40°C

d

50°C

answer is B.

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Detailed Solution

 100−100(5R6)×R3=60°
(where R is thermal resistance of each rod)
 

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