PHY 101 - Meeting #8


Topic(s)
  • Electricity
  • Electric currents
  • Magnetism
Reading List 403-445 and 446-472
Objectives
  • Know what is meant by the terms electrically charged and neutral
  • Be able to compare and contrast insulators and conductors
  • Realize that electrical charge is conserved
  • Be able to explain how a charged object can attract a neutral object
  • Be able to explain what an electroscope is and how it can be used
  • Be able to state Coulomb's law for electrical forces
  • Be able to compare Coulomb's law to Newton's law of universal gravitation
  • Be able to describe the electric field around isolated charges
  • Recognize that a battery is combination of electrical cells, and that the voltage of each individual cell is determined by the nature of the chemical reaction of the chemicals in the cell
  • Know what is meant by a complete circuit
  • Know what is meant by the terms series and parallel
  • Know what is meant by the term electrical resistance
  • Be able to apply Ohm's law
  • Be able to predict the brightness of bulbs in a simple circuit
  • Understand (in general) how the electrical circuits in a house are wired
  • Know why fuses are necessary for electrical safety
  • Know how to calculate electrical power
  • Know that the kilowatt-hour is a unit of energy used to measure electrical usage
  • Be able to compare magnetic poles to electric charges - how are the similar and how do they differ
  • Be able to compare magnetic lines of force to electric lines of force (i.e. compare magnetic field lines to electric field lines)
  • Realize that an electric current can create a magnetic field
  • Realize that a current (or moving charge) in a magnetic field can experience a force depending on the angle between the two
  • Be able to describe the motion that occurs for charges moving parallel and perpendicular to the magnetic field
  • Appreciate the fact that the earth's magnetic north pole is actually a south magnetic pole
  • Realize that the magnetic north pole is not located exactly at the geographic north pole.
  • Know how objects become magnetized
  • Know how permanent magnets can be destroyed
  • Know that a changing magnetic field in a circuit can generate an electrical voltage or current in the circuit
Homework Computer Exercise - Complete before class on 17-Apr -- materials for this exercise will be passed out in class.(note:  although you are encouraged to work with a partner, EACH student must submit his/her own work for this exercise)
  • Chapter 20 Questions:  2, 5, 7, 15, 16, 18, 28, 34, 36, 39, 51
  • Chapter 20 Exercises:  3, 6, 21
  • Chapter 21 Questions:  1, 2, 6, 11, 12, 17, 18, 30, 33, 37, 44, 45
  • Chapter 21 Exercises:  1, 6, 13, 19, 20