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Question 6315
NEET Physics · Hard

Mechanical Properties of Solids: Stress and Strain MCQ

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Stress and StrainHardQuestion 6315

Question

A 2 m wire (cross-section 2 mm²) stretched by 1 mm. Y = 2×10¹¹ Pa. Force applied:
  1. A
    200 N
    Correct
  2. B
    2000 N
  3. C
    20 N
  4. D
    0.2 N

Correct answer

200 N

Explanation

F = YA ΔL/L = 2×10¹¹ × 2×10⁻⁶ × 10⁻³/2 = 2×10¹¹ × 10⁻⁹ = 200 N.

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