TS EAMCET · Physics · Thermal Properties of Matter
A sheet of steel at \(20^{\circ} \mathrm{C}\) has size as shown in figure below. If the co-efficient of linear expansion for steel is \(10^{-5 \circ} \mathrm{C}^{-1}\), then what is the change in the area at \(60^{\circ} \mathrm{C}\) ?
- A \(0.84 \mathrm{~cm}^2\)
- B \(0.64 \mathrm{~cm}^2\)
- C \(0.24 \mathrm{~cm}^2\)
- D \(0.14 \mathrm{~cm}^2\)
Answer & Solution
Correct Answer
(B) \(0.64 \mathrm{~cm}^2\)
Step-by-step Solution
Detailed explanation
Given, \(t_1=20^{\circ} \mathrm{C}\) and \(t_2=60^{\circ} \mathrm{C}\) Coefficient of linear expansion, \(\alpha=10^{-5 \circ} \mathrm{C}^{-1}\) As we know that, coefficient of area expansion is…
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