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AP EAMCET202022 Sep 2020Evening ShiftPhysicsMechanical Properties of SolidsActual

According to the Hooke's law the force required to change the length of a wire by l is proportional to

Options

  1. AI⁻²
  2. BI⁻¹
  3. C/
  4. DI^2

Correct answer

C. /

Step-by-step solution

Given, change in length, l=lL= original length (say) According to Hooke's law, aligned & Stress Strain & Stress Strain = constant & Stress Strain = Young's modulus & F / A l L =Y F L A l =Y & F= Y A l L & aligned Since, Y, A, L are constant. Hence, F l But l=l F l

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