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Question

From the stress against strain graph, the behavior of the wire between elastic limit and yield point is :

A
Perfectly elastic
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B
Formation of neck
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C
Perfectly plastic
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D
Elastic but with permanent deformation
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Solution

The correct option is C Perfectly elastic
From Stress-Strain graph shown in the figure the behavior of wire between elastic limit and yield point is perfectly elastic as beyond yield point the wire will not come back to its original size.
628958_601437_ans_113ff158ba4e462dae200c1b66fa1cf8.jpg

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