the ratio of the linear expansivity of copper to that of iron is approximately 1.5….

the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is
  • A.
    3
  • B.
    1.5
  • C.
    1.32
  • D.
    1
  • E.
    0.67
Correct Answer: Option E
Explanation

(alpha_1)L1 = (alpha_2)L2
(frac{L_1}{L_2}) = (frac{alpha_1}{1.5alpha_2}) (since a1– 1.5(alpha_2))
(frac{L_1}{L_2}) = 0.67

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