NEET Physics (general) MCQ Question
Which of the following statements about the properties of materials under stress is/are correct?
The Young's modulus of rubber is less than that of steel.
The elastic limit of typical rock is greater than that of steel.
Shear modulus is used to determine the stretching of a coil.
A beam with a rectangular cross-section is more efficient than one with a distributed shape at the ends.
Correct Answer
Detailed Explanation
The Young's modulus of rubber is indeed less than that of steel, indicating that rubber is more elastic. The elastic limit for typical rock is higher than that for most materials but not specifically mentioned as being greater than steel. The shear modulus is not used for determining coil stretching, which relates to tensile stress. Lastly, beams with distributed shapes at the ends are typically more efficient due to better load distribution.
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