Question

1. Which of the following materials is most elastic? (1) Steel (2) Rubber (3) Copper (4) Glass 2. The restoring force per unit area is known as (1) strain (2) elasticity (3) stress (4) plasticit 3. Substances which can be stretched to cause large strains are called (1) brittle (2) ductile (3) plastic (4) elastomer 4. Which of the following affects the elasticity of a substance? (1) Hammering and annealing (2) Change in temperature (3) Impurity in substance (4) All of the above 5. Which of the following types of stress causes no chang in shape? (1) Compressive stress (2) Hydraulic stress (3) Shearing stress (4) None of these 6. Which of the following elastic moduli is used to describe the elastic behaviour of object as they respond to the deforming forces acting on them? (1) Young’s modulus (2) Shear modulus (3) Bulk modulus (4) All of these 7. When a fluid compresses an object, then the Hooke’s law is expressed as (1) F=kV (2) V P V   (3) V P B V       

Answer 1

Answer:

steel is the most elastic metal