Transcript Bell Work: Compare and Contrast

Bell Work: Compare and Contrast
Use a Venn diagram or table to compare
and contrast:
1. AC and DC
2. Series and Parallel
AC
Both
DC
AC
Both
Electrons vibrate Must be closed
in place
to have current
Low friction
V and I are
directly related
Long distances
R and I are
inversely related
Power plants
Must have wires
with low
resistance
Homes and
Transfer electric
businesses
energy to the
resistors
DC
Electrons move
through
High friction
Short distances
Batteries
Cars and
handheld
devices
Series
One path
Both
Must be closed
to have current
Add resistors, RT V and I are
increases
directly related
Voltage adds up R and I are
inversely related
Current the
Must have wires
same
with low
throughout
resistance
One bulb out, all Transfer electric
bulbs go out
energy to the
resistors
Parallel
Multiple paths
Add resistors, RT
decreases
Current adds up
Voltage drop
same through all
branches
One bulb out,
rest stay on
TODAY
1. Complete a parallel circuit practice problem
together.
2. Finish up parallel lab. Fix typos:
 12) … . .look at steps 7-9. . . . ..
 12) . . . bulbs (in step 5) . . . .total current in step 5
was: _____
1. Work on parallel practice problems
2. Pick up review sheet to work on tonight.
3. Pick up a folder check – bring any questions with
you tomorrow.
4. TEST THURSDAY