After studying this chapter the students will be able to:
• distinguish between the structure of crystalline, glassy, amorphous and
polymeric solids.
• describe that deformation in solids is caused by a force and that in one
dimension, the deformation can be tensile or compressive.
• describe the behaviour of springs in terms of load-extension, Hooke's law
and the spring constant.
• define and use the terms Young's modulus, bulk modulus and shear
modulus.
• demonstrate knowledge of the force-extension ~raphs for typical ductile,
brittle and polymeric materials.
• become familiar of ultimate tensile stress, elastic deformation and plastic
deformation of a material.
• describe the idea about energy bands in solids.
• classify insulators, conductors, semiconductors on the basis of energy
bands.
• become familiar with the behaviour of superconductors and their potential°
uses.
• distinguish between dia, para and ferromagnetic materials.
• describe the concep~ of magnetic domains in a material.
• explain the Curie point.
• classify hard and soft ferromagnetic substances.
• describe hysteresis loss.
• synthesise from hysteresis loop how magnetic field strength varies with
magnetizing current.
Materials have specific uses depending upon their characteristics and properties
such as, hardness, brittleness, ductility, malleability, conductivity etc.
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