KVPY SX SB Exam 2013 Question Paper

Question : 100 of 120

Marks: +1, -0

A metallic prong consists of 4 rods made of the same material, cross-sections and same lengths as shown. The three forked ends are kept at 100°C and the handle end is at 0°. The temperature of the junction is

25° C
50° C
60° C
75° C

Validate

Solution:

3\kA/l[100-\T]=\kA/l[\T-0]

3w - 3T = T
T = 75° C

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