Heat and Thermodynamics 2 Question 5
8. A bimetallic strip is formed out of two identical strips-one of copper and the other of brass. The coefficients of linear expansion of the two metals are and . On heating, the temperature of the strip goes up by and the strip bends to form an arc of radius of curvature . Then, is
(a) proportional to
(b) inversely proportional to
(c) proportional to
(d) inversely proportional to
Integer Answer Type Question
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Answer:
Correct Answer: 8.
Solution:
- Let
be the initial length of each strip before heating. Length after heating will be
[From binomial expansion]