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All the resistors are
six ohms and all the
batteries are 12 volts.
What is the current
through the resistor
labeled R?
A bit of a summery.
KIRCHOFF’S LAWS - III
What’s up?
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Clouds
Quiz Today
Exam Next Wednesday
Start new topic on Wednesday, after exam.
NO REVIEW on Monday.
Make sure you do the WebAssigns
 Same 3x5 index card allowed on the exam.
You must actually solve the problem on the
exam, not just write the answer down.
The current out of the battery is 8 Amperes and
6 amperes flow through the resistor on the left.
How much current flows through the other
resistor?
A
B
C
D
E
8 Amperes
6 Amperes
14 Amperes
2 Amperes
Not enough Information
Consider
3A ^
5A  2A v
6A
8A
REVIEW: WEDNESDAY’S ACTIVITY
Wednesday you measured
voltages around the
following circuit:
2W
2W
- +
12 Volts
Let’s Assume These Values
V 12
I 
 3A
R 4
Across each bulb
is IR=3 x 2 = 6 Volts
12.0
L
H
L
L
H
H
V=0
L
H
-6.0
L
H
L
V=0
L
H
H
12.0
L
H
-6.0
L
-6.0 Voltage “rise”
H
L
V=0
L
H
H
12.0
L
H
Sum of Voltage RISES around the closed loop = 12 -6 -6 =0
R1 = 2.00 Ω
R2 = 8.50 Ω
All the resistors are six ohms and all the batteries are
12 volts. What is the current through the resistor
labeled R?