TS EAMCET · Physics · Thermal Properties of Matter
The area of a circular copper coin increases by \(0.4 \%\) when its temperature is raised by \(100^{\circ} \mathrm{C}\). The coefficient of linear expansion of the coin is :
- A \(1 \times 10^{-5} /{ }^{\circ} \mathrm{C}\)
- B \(2 \times 10^{-5} / \mathrm{C}\)
- C \(3 \times 10^{-5} /{ }^{\circ} \mathrm{C}\)
- D \(4 \times 10^{-5} / \mathrm{C}\)
Answer & Solution
Correct Answer
(B) \(2 \times 10^{-5} / \mathrm{C}\)
Step-by-step Solution
Detailed explanation
Given, area of a circular copper coin increases by \(0.4 \%\). i.e., \(\quad \frac{\Delta A}{A}=0.004\) Increase in temperature, \(\Delta T=100^{\circ} \mathrm{C}\) We lonow that, the coefficient of areal expansion \(\beta\) is given by…
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