Multiple choice

Poisson’s ratio is defined as

  1. $\Big|\frac{\text{axial stress}}{\text{lateral stress}}\Big|$
  2. $\Big|\frac{\text{lateral strain}}{\text{axial strain}}\Big|$
  3. $\Big|\frac{\text{lateral stress}}{\text{axial stress}}\Big|$
  4. $\Big|\frac{\text{axial strain}}{\text{lateral strain}}\Big|$
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B Correct answer
Explanation

Poisson's ratio is defined as the negative ratio of lateral strain to axial strain. Since the ratio is typically expressed as a positive value, the absolute value is used.

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