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53. Young’s modulus of rubber is

Young’s modulus of rubber is 104 N/m2 and area of cross-section is 2 cm2 . If force of  2×105 dynes is applied along its length, then its initial length l  becomes

(a)    3L                                           (b)    4L

(c)   2L                                            (d)   None of the above

Answer-c

(10)

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