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36. If a load of 9 kg is suspended on a wire, the increase in length is 4.5 mm. The force constant of the wire is

(a)    0.49×104  N/m                         (b)  1.96×104  N/m

(c)  4.9×104  N/m                              (d)  0.196×104  N/m

Answer-b

(17)

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