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A thin copper wire of length 1 metre inc...

A thin copper wire of length `1` 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 `1` metre is heated through `10^(@)C` ?

A

`4%`

B

`8%`

C

`16%`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`A =l^(2) rArr (Delta A)/(A) xx 100 = 2(Delta l)/(l) xx 100 =2 (2 %) = 4%
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