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NEET Physics · Medium

Mechanical Properties of Solids: Thermal Stress MCQ

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Thermal StressMediumQuestion 6361

Question

Steel rod (Y=2×10¹¹, α=10⁻⁵ /°C) heats by 10°C (ends fixed). Thermal stress:
  1. A
    2×10⁷ Pa
    Correct
  2. B
    2×10⁸ Pa
  3. C
    2×10⁶ Pa
  4. D
    2×10⁹ Pa

Correct answer

2×10⁷ Pa

Explanation

σ = YαΔT = 2×10¹¹×10⁻⁵×10 = 2×10⁷ Pa.

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