The force constant of a wire does not depend on
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(d) $K = \frac{{YA}}{L} = \frac{{Y \times \pi {r^2}}}{L} \Rightarrow K \propto \frac{{Y{r^2}}}{L}$
i.e. force constant of a wire depends on young's modules (nature of the material), radius of the wire and length of the wire.
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