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A metal rod of Young's modulus 2xx10^(10...

A metal rod of Young's modulus `2xx10^(10)Nm^(-2)` undergoes an elastic strain of `0.06%.` The energy per unit volume stored in `Jm^(-3)`is

A

3600

B

7200

C

1800

D

900

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The correct Answer is:
A
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