1. Kirchoff’s laws - iii 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

2. What’s up? 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.

3. 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 8 Amperes
B 6 Amperes
C 14 Amperes
D 2 Amperes
E Not enough Information

4. Consider
3A ^
2A v
5A 
6A
8 A

5. review: Wednesday’s activity

6. Wednesday you measured voltages around the following circuit:
2W W
- +
Across each bulb
is IR=3 x 2 = 6 Volts
12 Volts
Let’s Assume These Values

7. 12.0
L H L H
L H
V=0
L H

8. -6.0
L H L H
L H
12.0
V=0
L H

9. -6.0
-6.0 Voltage “rise”
L H L H
L H
12.0
V=0
L H
Sum of Voltage RISES around the closed loop = =0
Kirchoff’s Second Law

10. Let’s Do the Kirchoff Again!
R1 = 2.00 Ω R2 = 8.50 Ω

11. All the resistors are six ohms and all the batteries are 12 volts
All the resistors are six ohms and all the batteries are 12 volts. What is the current through the resistor labeled R?

12. Finish the
Kirchoff Experiment