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NEET • PHYSICS • MECHANICAL PROPERTIES OF SOLIDS
Mechanical properties of solids practice · Medium
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Which one of the following quantities does not have the unit of force per unit area
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Correct option: B
Strain
Option B (Strain) is correct because strain is a dimensionless quantity, representing the ratio of change in length to original length, and thus has no units of force per unit area.
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Steel is preferred for making spring over
copper. Why?
copper. Why?
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Correct option: B
Young's Modulus of steel is more than that of copper
Option B (Young's Modulus of steel is more than that of copper) is correct because a higher Young's modulus indicates greater stiffness, making steel a better choice for springs.
123
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Within proportional limit, the slope of the stress stain curve yields,
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Correct option: B
Modulus of elasticity
Option B (Modulus of elasticity) is correct because the slope of the stress-strain curve within the proportional limit represents the modulus of elasticity, which quantifies the material's stiffness.
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