2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Wave Mechanics

JEE Main & Advanced Physics Wave Mechanics Question Bank Self Evaluation Test - Mechanical Properties of Solids

  • question_answer
    The elastic limit of steel is \[8\times {{10}^{8}}N/{{m}^{2}}\] and it?s Young's modulus\[2\times {{10}^{11}}N/{{m}^{2}}\]. Find the maximum elongation of a half-meter steel wire that can be given without exceeding the elastic limit.

    A) 2mm

    B) 4mm

    C) 5mm

    D) 6mm

    Correct Answer: A

    Solution :

    [a] \[Y=\left( \frac{F}{A} \right)\times \frac{L}{\Delta L}\] \[\Rightarrow \Delta L\left( \frac{F}{A} \right)\frac{L}{Y}=\frac{8\times {{10}^{8}}\times 0.5}{2\times {{10}^{11}}}=2mm\]


You need to login to perform this action.
You will be redirected in 3 sec spinner