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NEET 2023
Exam
NEET
Year
2023
Subject
Physics
Chapter
Mechanical Properties of Solids

NEET 2023 · Physics · Mechanical Properties of Solids

Let a wire be suspended from the ceiling (rigid support) and...

Let a wire be suspended from the ceiling (rigid support) and stretched by a weight WW attached at its free end. The longitudinal stress at any point of cross-sectional area AAof the wire is:

Options

  1. AZero
  2. B2WA\dfrac{2W}{A}
  3. CWA\dfrac{W}{A}
  4. DW2A\dfrac{W}{2A}

Correct answer

C. WA\dfrac{W}{A}

Step-by-step solution

Longitudinal stress is given by,

stress=forcearea=WAstress = \dfrac{force}{area} = \dfrac{W}{A}

In case of ideal wire, stress at each point will be the same and will be equal to WA\dfrac{W}{A}.

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