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16-8 Field Lines 16-9 Electric Fields and Conductors 16-10 Gauss’s Law Objectives: 1. Summarize the properties of field lines. 2. Explain the patterns of electric fields in terms of conductors. 3. Explain the key components of Guass’s Law. Homework: 32-38 even, 43-49 odd pp. 466-467 Formula Search –Find all formulas state the units and purpose for making calculations. Vocabulary to Know: Vector Electric field Forces Lines of Force Test charge Positive charge Negative charge Electric dipole Repulsion Gravitational Field Force per unit mass Conductors Free electrons Net charge Static electric fields Electric flux Gauss’s law Area 16-8 Field Lines: 1. Why is an electric field a vector quantity? 2. What process can be used to visualize the electric field between two carges? 3. For what, do electric field lines indicate? 4. In what direction do electric field lines move? 5. Compare and contrast field lines near and at a distance to the charges. 6. Draw and explain four different electric field lines for four arrangements of charges. 7. Summarize the properties of field lines. 8. How can the “field concept” be applied to gravitational force? 16-9 Electric Fields and Conductors: 1. Describe the electric field in a conductor. 2. What consequences exist concerning electric fields in conductors? 3. State a related property of static electric fields and conductors. 4. What happens to electric fields in nonconductors? 5. How does Faraday’s cage work? 16-10 Gauss’s Law: 1. What is the relationship of Coulomb’s to Gauss’s law? 2. Explain the concept of electric flux. 3. Explain how electric flux has a simple intuitive interpretation in terms of field lines. 4. How does Gauss’s law apply to any surface?