1. Bell Work: Compare and Contrast
Use a Venn diagram or table to compare and contrast:
AC and DC
Series and Parallel AC
Both DC

2. AC
Both DC
Electrons vibrate in place
Must be closed to have current
Electrons move through
Low friction
V and I are directly related
High friction
Long distances
R and I are inversely related
Short distances
Power plants
Must have wires with low resistance
Batteries
Homes and businesses
Transfer electric energy to the resistors
Cars and handheld devices

3. Series
Both
Parallel
One path
Must be closed to have current
Multiple paths
Add resistors, RT increases
V and I are directly related
Add resistors, RT decreases
Voltage adds up
R and I are inversely related
Current adds up
Current the same throughout
Must have wires with low resistance
Voltage drop same through all branches
One bulb out, all bulbs go out
Transfer electric energy to the resistors
One bulb out, rest stay on

4. TODAY Complete a parallel circuit practice problem together.
Finish up parallel lab. Fix typos:
12) … . .look at steps
12) bulbs (in step 5) total current in step 5 was: _____
Work on parallel practice problems
Pick up review sheet to work on tonight.
Pick up a folder check – bring any questions with you tomorrow.
TEST THURSDAY