117. A wire of length 2 m is made from  10

A wire of length 2 m is made from  10 cm³ of copper. A force F is applied so that its length increases by 2 mm. Another wire of length 8 m is made from the same volume of copper. If the force F is applied to it, its length will increase by

(a)   0.8 cm                                     (b)   1.6 cm

(c)   2.4 cm                                     (d)   3.2 cm

Answer-d

(8)