Practice free Mechanical Properties of Solids (Physics) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The stress-strain curves vary from material to material. What do these curves primarily help us understand?
The NCERT highlights, 'The stress-strain curves vary from material to material. These curves help us to understand how a given material deforms with increasing loads.'
What is the nature of the deformation in the O to A region of a stress-strain curve?
The NCERT states, 'In the region between O to A, ... The body regains its original dimensions when the applied force is removed. In this region, the solid behaves as an elastic body.' Elastic implies reversible.
Which of the following engineering applications heavily relies on the elastic behavior of materials?
The provided text states, 'The elastic behaviour of materials plays an important role in engineering design. For example...Can we design an aeroplane which is very light but sufficiently strong?' This directly links the elastic behavior of materials to the design of light yet strong structures like airplane wings.
Why is the I-shape commonly used for railway tracks and steel girders in construction?
The text poses the question: 'Why does a railway track have a particular shape like I?' While the direct answer isn't given, implicitly, this shape is chosen due to elastic behavior considerations to withstand forces efficiently. I-beams are engineered to have high strength-to-weight ratios, resisting bending and buckling effectively, which is a key application of elastic behavior in structural design.
According to the provided text, what characteristic of a material ensures it is considered highly elastic?
The 'POINTS TO PONDER' section clarifies: 'In daily life, we feel that a material which stretches more is more elastic, but it is a misnomer. In fact, material which stretches to a lesser extent for a given load is considered to be more elastic.' This contradicts common intuition and highlights the scientific definition of elasticity.
When designing a building, why is knowledge of the elastic properties of materials like steel and concrete essential?
The text states, 'The elastic behaviour of materials plays an important role in engineering design. For example, while designing a building, knowledge of elastic properties of materials like steel, concrete etc. is essential.' This indicates that understanding how these materials deform under stress and return to their original shape is crucial for structural integrity and safety.
Why would an engineer prefer a material with a large Young's modulus for a structural component expected to resist small changes in length?
The 'POINTS TO PONDER' section notes: 'A material with large value of Young’s modulus requires a large force to produce small changes in its length.' This property is desirable for structural components where minimal deformation under stress is critical.
Which of the following statements about Young's modulus is correct, according to the provided text?
The 'POINTS TO PONDER' section explicitly states: 'Metals have larger values of Young’s modulus than alloys and elastomers.' Also, 'Young’s modulus and shear modulus are relevant only for solids since only solids have lengths and shapes.'
Why is it important to design an artificial limb to be both lighter and stronger?
The text asks, 'Can we design an artificial limb which is lighter but stronger?' This question highlights the practical application of elastic properties in balancing weight and strength for improved user experience and functionality in prosthetics.
The design of ropeways requires careful consideration of the elastic properties of which material primarily?
The text states, 'The same is true in the design of bridges, automobiles, ropeways etc.' This implies that, similar to structures like bridges, ropeways rely on the elastic behavior of strong solid materials (like steel cables) to safely support loads and withstand stresses.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.