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Shashank Pratap Mangal
Asked: 2022-10-29T03:46:17+05:30 In:

A copper wire of length l increases in length by 0.3 % on heating from `20^@C` to `40^@C.` Then percentage change in area of copper plate of dimensions `3 lxx 2l` on heating from `20^@C` to `40^@C` is
A. `0.05%`
B. `0.3%`
C. `0.4%`
D. `0.6%`

A copper wire of length l increases in length by 0.3 % on heating from `20^@C` to `40^@C.` Then percentage change in area of copper plate of dimensions `3 lxx 2l` on heating from `20^@C` to `40^@C` is
A. `0.05%`
B. `0.3%`
C. `0.4%`
D. `0.6%`
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  1. Correct Answer – D

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