NEET Exam > NEET Videos > Additional Study Material for NEET > L1 Properties of solids and fluids (elasticity)- Introduction ,Class 11, Physics
L1 Properties of solids and fluids (elasticity)- Introduction ,Class 11, Physics Video Lecture | Additional Study Material for NEET
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FAQs on L1 Properties of solids and fluids (elasticity)- Introduction ,Class 11, Physics Video Lecture - Additional Study Material for NEET
| 1. What is elasticity in the context of solids and fluids? |  |
Ans. Elasticity refers to the ability of a material to deform under the influence of an external force and then return to its original shape and size when the force is removed. It is a property exhibited by both solids and fluids, although the degree of elasticity can vary significantly between different materials.
| 2. What are the types of elasticity? | |
Ans. There are three types of elasticity:
1. Young's modulus (also known as the modulus of elasticity) measures the ratio of stress to strain within the elastic limit of a material. It is used to determine the stiffness or rigidity of a solid material.
2. Shear modulus (also known as the modulus of rigidity) measures the ratio of shear stress to shear strain within the elastic limit of a material. It is used to determine the ability of a material to resist deformation by shear forces.
3. Bulk modulus measures the ratio of the change in volume to the change in pressure within the elastic limit of a material. It is used to determine the compressibility of a material.
| 3. How is Young's modulus calculated? | |
Ans. Young's modulus (Y) is calculated by dividing the stress (force per unit area) applied to a material by the strain (change in length per unit length) experienced by the material. Mathematically, it is expressed as Y = stress/strain.
| 4. What is the significance of elasticity in materials? | |
Ans. Elasticity is a crucial property of materials as it determines their ability to withstand external forces without undergoing permanent deformation. This property is essential in various applications, such as structural engineering, where materials need to withstand loads and stresses without breaking or fracturing. Additionally, elasticity also plays a significant role in the behavior of fluids, influencing their flow and response to external pressure.
| 5. How does the temperature affect the elasticity of materials? | |
Ans. Temperature can significantly affect the elasticity of materials. Generally, as the temperature increases, the elasticity of most materials decreases. This is due to the increased thermal motion of the atoms or molecules within the material, which disrupts the regular arrangement and bonding between them. As a result, the material becomes more prone to deformation and less stiff. However, some materials, such as rubber, exhibit an opposite behavior called "thermal expansion," where their elasticity increases with temperature.
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Nov 21, 2024 Last updated |
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