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The stress versus strains graphs for wir...

The stress versus strains graphs for wires of two materials A and B are as shown in the figure. If YA and YB are the Young's moduli of the materials, then

A

`Y_(B)=2Y_(A)`

B

`Y_(A)=Y_(B)`

C

`Y_(B)=3Y_(A)`

D

`Y_(A)=3Y_(B)`

Text Solution

Verified by Experts

The correct Answer is:
D
`("Stress")/("Strain")=Y="slope of graph"`
`:.(Y_(A))/(Y_(B))=(tan 60^(@))/(tan30^(@))=3`
`:.Y_(A)=3Y_(B)`
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