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A metal wire is observed to stretch by o...

A metal wire is observed to stretch by one part in a million when subjected to a stress of `8xx10^(4)N//m^(2)`. The Young's modulus of the metal is

A

`8xx10^(10)N//m^(2)`

B

`80xx10^(10)N//m^(2)`

C

`0.8xx10^(10)N//m^(2)`

D

`80xx10^(10)"dyne"//cm^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`y=("stress")/("strain")=(8xx10^(4)xx10^(6))/(1)=8xx10^(10)N//m^(2)`.
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