NEET Physics (general) MCQ Question
Which of the following statements about the mechanical properties of solids is correct?
The stress experienced by a material is proportional to the applied force divided by the cross-sectional area.
A beam's design does not significantly affect its load-bearing capacity.
Deformation in materials is always visually noticeable.
A material's elastic limit is the maximum stress it can endure before permanent deformation.
Correct Answer
Detailed Explanation
Statement A is correct as it directly follows from the definition of stress, which is the restoring force per unit area. Statement B is incorrect as the design of a beam greatly influences its load-bearing capacity. Statement C is not true since deformation may not always be visually noticeable. Statement D is misleading as the elastic limit refers to the maximum stress before a material begins to deform permanently, not the maximum stress it can endure.
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