1. Electric Current and Circuits

2. Current Affairs... Defining Current Current Density and Conductivity Drift Velocity - an application of ideas

3. Resistance and Ohm’s Law What is resistance? How does resistance depend on the medium? “Ohmic” and non- Ohmic Materials Ohm’s Law

4. Energy in Electrical Circuits How Voltage Potential Difference and Energy are related Power EMF and Batteries

5. Resistor Networks and Simple Circuits Resistors in: –series –parallel

6. Circuits and Kirchhoff’s Laws Rule#1: In any closed loop the sum of the changes in potential must equal zero. Rule#2: At any junction in the circuit the amount of current-in equals the amount of current-out

7. Web Resources... Project MAP “Circuit Builder” applet“Circuit Builder” applet –example: page 808 in text Project MAP modules on… –currentcurrent –resistanceresistance –Kirchhoff’s LawsKirchhoff’s Laws –Power in CircuitsPower in Circuits –Potentials in circuitsPotentials in circuits

8. RC Circuits What happens when capacitors and resistors are used in a circuit? Discharging, Charging, and Time Constants Go to applet showing this