If the interatomic spacing in a steel wire is \( 3.0 \AA \) and \( Y_{\text {steel }}= \) \( 20 ...

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If the interatomic spacing in a steel wire is \( 3.0 \AA \) and \( Y_{\text {steel }}= \) \( 20 \times 10^{10} \mathrm{~N} / \mathrm{m}^{2} \) then force constant is
[RPET 2001; Similar JIPMER 1978; MP PET 2013]
(a) \( 6 \times 10^{-2} N / \AA \)
(b) \( 6 \times 10^{-9} N / \AA \)
(c) \( 4 \times 10^{-5} \mathrm{~N} / \AA \)
(d) \( 6 \times 10^{-5} \mathrm{~N} / \AA \)
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