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When a force is applied on a wire of uni...

When a force is applied on a wire of uniform cross-sectional are `3 xx 10^(-6) m^(2)` and length 4 m, the increase in length is 1 mm. Energy stored in it will be (Given, `Y = 2 xx 10^(11) Nm^(-2)`)

A

6250 J

B

0.177 J

C

0.075 J

D

0.150 J

Text Solution

Verified by Experts

The correct Answer is:
C
`U= (1)/(2) xx (AY l^(2))/(L)= (1)/(2) xx (2 xx 10^(11) xx 3 xx 10^(-6) xx (1 xx 10^(-3))^(2))/(4)= 0.075J`
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