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If young's modulus of iron be 2xx10^(1...

If young's modulus of iron be `2xx10^(11) Nm^(-2)` and interatomic distance be `3xx10^(-10) m^(-2)`, the intertomic force constant will be (in `N//m`)

A

60 N/m

B

120 N/m

C

30 N/m

D

180 N/m

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The correct Answer is:
A
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