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NEET Physics · Medium

Mechanical Properties of Solids: Poisson's Ratio MCQ

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Poisson's RatioMediumQuestion 6359

Question

Wire of diameter 1 mm stretched by 0.1%. If ν = 0.3, change in diameter:
  1. A
    3×10⁻⁴ mm (decrease)
    Correct
  2. B
    3×10⁻⁴ mm (increase)
  3. C
    0.3 mm (decrease)
  4. D
    0.1 mm (decrease)

Correct answer

3×10⁻⁴ mm (decrease)

Explanation

Lateral strain = ν × longitudinal strain = 0.3×0.001 = 3×10⁻⁴. Change in d = 3×10⁻⁴×1 mm = 3×10⁻⁴ mm (decrease).

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