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Mechanical Properties of Solids MCQs for NEET — Physics Questions with Answers

Practice free Mechanical Properties of Solids (Physics) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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What kind of material would be most suitable for manufacturing springs that need to return to their original shape precisely after being stretched?

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Explanation

The introductory paragraph explains elasticity: 'The property of a body, by virtue of which it tends to regain its original size and shape when the applied force is removed, is known as elasticity.' Materials like steel are excellent for springs because they possess high elasticity and exhibit a well-defined elastic region, ensuring they return to their original form.

NEET 2023
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Let a wire be suspended from the ceiling (rigid support) and stretched by a weight $W$ attached at its free end. The longitudinal stress at any point of cross-sectional area $A$ of the wire is:

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Explanation

Tension throughout the wire equals $W$; stress = tension/area = $W/A$.

NEET 2024
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The maximum elongation of a steel wire of 1 m length if the elastic limit of steel and its Young's modulus, respectively, are $8\times 10^8\ \text{N m}^{-2}$ and $2\times 10^{11}\ \text{N m}^{-2}$, is:

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Explanation

$\Delta L = \sigma L/Y = 4\times 10^{-3}$ m $= 4$ mm.

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