AP EAMCET Engineering 22 Apr 2019 Shift 2 Paper

Section: Physics

Question : 96 of 160

Marks: +1, -0

A composite bar of uniform cross section is made of 25 cm of Copper. 10 cm of Nickel and 15 cm of Aluminium with perfect thermal contacts. Tire free copper end of the rod is at 100 °C and the free Aluminium end is at 0 °C. If KCu = 2 KAl and KAl = 3 KNi, then the temperatures of Cu-Ni and Ni-Al junctions are respectively
(Assume no loss of heat occurs from the sides of the rod. K- thermal conductivity)

82.3 °C , 31.3 °C
78.3 °C , 26.1 °C
70 °C , 23.3 °C
90.3 °C , 30.1 °C

Validate

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