Question:medium
A steel rod of length 5 m and radius 2 cm is kept at room temperature and heated to 10°C above room temperature. The change in the cross-sectional area of the rod is (coefficient of linear expansion = \(10 \times 10^{-6} \, ^\circ\text{C}^{-1}\)).
A steel rod of length 5 m and radius 2 cm is kept at room temperature and heated to 10°C above room temperature. The change in the cross-sectional area of the rod is (coefficient of linear expansion = \(10 \times 10^{-6} \, ^\circ\text{C}^{-1}\)).
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For solids: linear expansion = αΔT, area expansion = 2αΔT, volume expansion = 3αΔT.
Updated On: Jun 20, 2026
- 0.01%
- 0.02%
- 0.03%
- 0.09%
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The Correct Option is B
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