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A copper rod 2m long is stretched by 1mm...

A copper rod 2m long is stretched by 1mm. Strain will be -

A

`10^(-4)` , volumetric

B

`5 xx 10^(-4)` , volumetric

C

`5 xx 10^(-4)` , longitudinal

D

`5 xx 10^(-3)` , volumetric

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