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

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

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

TODAY Complete a parallel circuit practice problem together. Finish up parallel lab. Fix typos: 12) … . .look at steps 7-9. . . . .. 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