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Five identical rods are joined as shown in figure. Point A and C are maintained at temperature 120°C and 20°C respectively. The temperature of junction B will be

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70°C

100°C

80°C

0°C

answer is C.

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Detailed Solution

Question Image

If thermal resistance of each rod is considered R then, the given combination can be redrawn as follows

(Heat current)_AC = (Heat current)_AB

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