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A copper wire was subjected to a tensile stress of 7.7 x ...

A copper wire was subjected to a tensile stress of 7.7 x 10^7. calculate strain of the wire.


[young modules = 1.1 x 1011 Nm-2]

A.

2. 0 x 10-5

B.

7.0 x 10-3

C.

7.0 x 10-4

D.

2.2 x 10-4

Correct answer is C

Young modules = Tensile stressTensile strain

= 1.1×1011=7.7×107Tensile Strain

∴ Tensile strain = 7.7×1071.1×1011

= 7.0×10711=7.0×104