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NCERT Textbook: Mechanical Properties of Solids | Science & Technology for UPSC CSE PDF Download

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FAQs on NCERT Textbook: Mechanical Properties of Solids - Science & Technology for UPSC CSE

1. What are the mechanical properties of solids?
Ans. Mechanical properties of solids refer to the physical characteristics that determine how a solid material responds to applied forces or external stimuli. These properties include elasticity, plasticity, strength, hardness, toughness, and brittleness.
2. What is elasticity?
Ans. Elasticity is the ability of a material to return to its original shape and size after the applied force is removed. It is a measure of how much a solid can deform under stress and then recover its original form when the stress is released.
3. What is plasticity?
Ans. Plasticity is the ability of a material to undergo permanent deformation without breaking or fracturing. When a solid material undergoes plastic deformation, its shape changes permanently, and it does not return to its original form once the stress is removed.
4. What is strength in the context of mechanical properties of solids?
Ans. Strength refers to the ability of a material to withstand an applied force without deformation or failure. It is a measure of the maximum stress a material can withstand before it yields, fractures, or breaks.
5. What is hardness?
Ans. Hardness is the resistance of a material to surface indentation or scratching. It is a measure of the material's ability to withstand localized deformation or penetration by an external object. Hardness is often related to the material's strength and can be determined using various hardness testing methods.
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