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NEET2013PhysicsMechanical Properties of SolidsActual

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

Options

  1. ALength =50 ~cm , diameter =0.5 ~mm
  2. BLength =100 ~cm , diameter =1 ~mm
  3. CLength =200 ~cm , diameter =2 ~mm
  4. DLength =300 ~cm , diameter =3 ~mm

Correct answer

A. Length =50 ~cm , diameter =0.5 ~mm

Step-by-step solution

L= F L A Y or L L d^2 [ A= d^2 4 ] Therefore, will be maximum for that wire which L A is maximum, so option (1) is correct.

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