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A thin copper wire of length l metre inc...

A thin copper wire of length `l` metre increases in length by `2%` when heated through `10^(@)C`. What is the percentage increase in area when a square copper sheet of length `l` metre is heated through `10^(@)C`

A

`4%`

B

`8%`

C

`16%`

D

`12%`

Text Solution

Verified by Experts

The correct Answer is:
A
Since percentage increase in length `=2%`
Hence, percentage increase in area of square sheet `=2xx2%=4%`
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DISHA PUBLICATION-PHYSICAL WORLD, UNITS AND MEASUREMENTS-Exercise - 1 : Concept Builder (Topicwise)(Topic 2 : Errors in Measurements and Significant Figures)
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