MCQOPTIONS
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| 1. |
A steel scale measures the length of a copper wire as \[80.0\,cm,\] when both are at \[20{}^\circ C\] (the calibration temperature for scale). What would be the scale read for the length of the wire when both are at \[40{}^\circ C\]? (Given asteel \[=11\times {{10}^{-6}}\]per°C and acopper \[=17\times {{10}^{-6}}per\,{}^\circ C\]) [CPMT 2004] |
| A. | \[80.0096\,cm\] |
| B. | \[80.0272\,cm\] |
| C. | \[1\,cm\] |
| D. | \[25.2\,cm\] |
| Answer» B. \[80.0272\,cm\] | |