Chapter 17: Physics of Solids

This is a seventh chapter of the book Physics 12 published by Punjab Curriculum and Textbook Board, Lahore, Pakistan.

After studying this chapter, the students will be able to:

• Distinguish between the structure of crystalline, glassy, amorphous and polymeric solids.
• Understand the idea of lattice.
• Appreciate that deformation is caused by a force and that, in one dimension, the deformation can be tensile or compressive.
• Define and use the terms Young's modulus, bulk modulus and shear modulus.
• Describe an experiment to determine elastic limit and yield strength.
• Distinguish between elastic and plastic deformation of a material.
• Synthesize and deduce the strain energy in a deformed material from the area under the force extension graph.
• Describe the energy bands in solids.
• Classify insulators, conductors, semi-conductors on the basis of energy bands.
• Distinguish between intrinsic and extrinsic semiconductors.
• Explain how electrons and holes flow across a junction.
• Describe superconductors.
• Distinguish between dia, para and ferro magnetic materials.
• Understand and describe the concept of magnetic domains in a material.
• Know the Curie point.
• Classify hard and soft ferro magnetic substances.
• Understand hysteresis and hysteresis loss.