Transcript Chapter 21 Temperature, Heat and Expansion

Chapter 32 Electrostatics
• Understand how electrical forces between objects occur.
Use the model of the atom and its particles to explain
charge. (protons, neutrons, electrons and their charges)
• How does an object becomes a) positively charged b)
negatively charged and relate this to the net charge.
• Understand and explain the Law of Conservation of
Charge.
• Describe the relation between the electrical force
between two charged objects, their charge and the
distance between them. (Coulomb’s Law) Find the
relative strength of force given changes in charge and
distance.
• Compare the strengths of electrical forces and
gravitational forces between charged objects. Why do
gravitational forces dominate for large objects, while
electrical forces dominate for small (atomic) objects.
• Understand triboelectricity and how it is different from
conductivity.
• Distinguish between a conductor and an insulator.
• Describe how an insulator can be charged by friction.
• Describe how a conductor can be charged by contact.
• Describe how a conductor can be charged without
contact by induction.
• Describe how an insulator can temporarily charged by
polarization
• Explain what superconductors and a semiconductors are.