For a material, the ratio of Young's modulus to rigidity modulus is 2.8 . If some force is applied on a wire…

For a material, the ratio of Young's modulus to rigidity modulus is 2.8 . If some force is applied on a wire made of this material, its cross-sectional area decreases by $2 \%$. The percentage change in its length is
  1. 0.4
  2. 1.6
  3. 2.5
  4. 4

Solution

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Asked in: AP EAMCET 2018 (24 Apr Shift 2)

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