Question:medium
The standard of length is maintained by a 1 meter long bar made up of a material having coefficient of linear expansion \( \alpha = 10^{-5}\,\text{°C}^{-1} \). If the length of the bar were to be preserved to an accuracy of 1 part per million, what would be the maximum allowed temperature variation?
The standard of length is maintained by a 1 meter long bar made up of a material having coefficient of linear expansion \( \alpha = 10^{-5}\,\text{°C}^{-1} \). If the length of the bar were to be preserved to an accuracy of 1 part per million, what would be the maximum allowed temperature variation?
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Very small temperature changes can affect precision measurements due to thermal expansion.
Updated On: May 1, 2026
- \( \pm 0.01^\circ C \)
- \( \pm 0.1^\circ C \)
- \( \pm 0.001^\circ C \)
- \( \pm 0.0001^\circ C \)
- \( \pm 1.0^\circ C \)
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The Correct Option is B
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