Elasticity
Physics ⇒ Mechanics
Elasticity starts at 11 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Elasticity.
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See sample questions for grade 11
Define plasticity.
Define stress and strain.
Explain the difference between elastic and plastic deformation with examples.
Explain why glass is considered brittle.
A copper wire of length 3 m and cross-sectional area 2 mm² is stretched by a force of 300 N. If the extension is 1.5 mm, calculate the Young's modulus.
A cube of volume 1 m³ is subjected to a uniform pressure of 10⁶ Pa, resulting in a decrease in volume by 0.001 m³. Calculate the bulk modulus.
A material has a bulk modulus of 2×10⁹ Pa. If a pressure of 4×10⁶ Pa is applied, what is the fractional change in volume?
A rod is compressed by a force of 500 N, causing a decrease in length of 0.2 mm. If the original length is 1 m and area is 5 cm², calculate the stress and strain.
If a material has a high Young's modulus, it is (1) very stiff, (2) very soft, (3) very ductile, (4) very brittle.
The area under the stress-strain curve up to the elastic limit represents (1) elastic potential energy per unit volume, (2) total energy, (3) work done by friction, (4) heat produced.
The property of a material to withstand a large permanent deformation without breaking is called (1) ductility, (2) elasticity, (3) malleability, (4) brittleness.
Which of the following is a correct statement about elastic and plastic deformation? (1) Elastic deformation is reversible, (2) Plastic deformation is reversible, (3) Both are reversible, (4) Neither is reversible.
The breaking stress of a material is also known as ________.
The elastic limit is the maximum ________ up to which a material can return to its original shape after the removal of the deforming force.
The modulus of elasticity that relates to the change in volume under pressure is called ________.
The modulus of rigidity is denoted by the symbol ________.
True or False: A perfectly elastic body regains its original shape completely after the removal of deforming force.
True or False: Poisson's ratio is always positive for most materials.
True or False: Strain has no units.
True or False: The elastic limit is always less than the breaking point of a material.
