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A steel wire of diameter 1 mm, and lengt...

A steel wire of diameter 1 mm, and length 2 m is stretched by applying a force of 2.2 kg wt. the strain is

A

`0.7xx10^(-4)`

B

`1.4xx10^(-4)`

C

`1.9xx10^(-5)`

D

`2.8xx10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
B
`(l)/(L)=(F)/(Ay)=(2.2xx10)/(3.14xx0.25xx10^(-6)xx2xx10^(11))`
`=(4.4)/(3.14)xx10^(-4)=1.4xx10^(-4)`
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