Question

A copper and a tungsten plate having a thickness 2mm each are riveted together so that at 0°C they form a flat
bimetallic plate. Find the average radius of curvature of this plate at 200°C. The coefficients of linear expansion
for copper and tungsten are 1.7x10-6-1 and 0.4x10 k respectively.

Answer 1

Answer:

ANSWER D

Explanation:

A copper and a tungsten plate having a thickness d each are riveted together so that at 0∘C they form a flat bimetallic plate. Find the average radius of the curvature of this plate at temperature T. the coefficient of linear expansion for copper and tungsten are αCuandαW.

Solution :

The average length of copper plate at a temparature TislC=l0(1+αCT). Where l0 is the length of copper plate at 0∘C . The length of the tungsten plate lt=l90)(1+αtT)

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