2. Describe the structure of an atom.
3. State Coulomb's law for electric force and compare it with Newton's law of gravity.
4. Account for the attraction between a charged object and an uncharged one.
5. Distinguish among conductors, semiconductors, and insulators.
6. Define ion and give several ways of producing ionization.
7. Define superconductivity and discuss it potential importance.
8. Describe electric current and potential difference (voltage) by analogy with the flow of water in a pipe.
9. Use Ohm's law to solve problems that involve the current in a circuit, the resistance of the circuit, and the voltage across the circuit.
10. Relate the power consumed by an electrical appliance to the current in it and the voltage across it.
11. Describe what is meant by a magnetic field and discuss how it can be pictured by field lines.
12. State the connection between electric charges and magnetic fields.
13. Explain how an electromagnet works.
14. Describe the force a magnetic field exerts on an electric current.
15. Discuss the operation of an electric motor.
16. Describe electromagnetic induction and explain how a generator makes use of it to produce an electric current.