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Question 6382
NEET Physics · Hard

Mechanical Properties of Solids: Advanced Solids Mixed MCQ

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Advanced Solids MixedHardQuestion 6382

Question

Elastic PE per unit volume = ½ × stress × strain. If stress = 10⁸ Pa and Y = 2×10¹¹ Pa:
  1. A
    25,000 J/m³
  2. B
    2.5×10⁴ J/m³
    Correct
  3. C
    5×10⁴ J/m³
  4. D
    10⁴ J/m³

Correct answer

2.5×10⁴ J/m³

Explanation

u = σ²/2Y = (10⁸)²/(2×2×10¹¹) = 10¹⁶/(4×10¹¹) = 2.5×10⁴ J/m³ = 2.5×10⁴ J/m³.

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