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    Question

    The stress–strain graph for two wires A and B is

    shown. Wire A has a steeper linear region than B. This indicates that:
    A A has lower breaking stress than B Correct Answer Incorrect Answer
    B A has lower Young’s modulus Correct Answer Incorrect Answer
    C A has higher Young’s modulus Correct Answer Incorrect Answer
    D A is more ductile Correct Answer Incorrect Answer

    Solution

    Given: – Stress–strain graphs for wires A and B – Wire A has a steeper linear region than wire B Concept: – In the linear region, slope = Young’s modulus (Y) – Y = Stress / Strain = slope of the linear part of the graph – A steeper slope means a greater Young’s modulus Interpretation: – Since wire A has a steeper slope, This means wire A is stiffer and requires more stress to produce the same strain.

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