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Q.

Three rods made of the same material and having the same cross-section have joined as shown in the Fig. Each rod is of same length. The left and right ends are kept at 0°C and 90°C respectively. The temperature of the junction of the three rods will be:

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a

45°C

b

60°C

c

30°C

d

20°C

answer is B.

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Detailed Solution

KA(90-θ)l+KA(90-θ)l=KA(θ-0)l⇒θ=60oC
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