1. Let’s Review:

2. Which of the objects has a “Total” negative charge?

3. Which of the objects has a “Total” positive charge?

4. Which of the objects has a “Total” neutral charge?

5. How did “B” become positive?
Gaining protons
Losing protons
Gaining electrons
Losing electrons

6. How did “C” become negative?
Gaining protons
Losing protons
Gaining electrons
Losing electrons

7. Electric
Circuits

8. What is an Electric Circuit?
An Electric Circuit is a closed path through which electricity flows.

9. Electric Circuits There are 3 parts to any Electric Circuit:
Energy Source
Energy Conductor
Energy Receiver

10. Energy Source
Energy Receiver(resistance)
Energy Conductor

11. You silly Brit, you probably forgot to “charge” it!!
What does it take to make an “electric device” work? My IPOD won’t come on!!!
You silly Brit, you probably forgot to “charge” it!!

12. In order to work properly, electricity has to get :
To the device
Through the device
And back to the other side of the battery(or outlet)

13. Investigate Open and Closed Circuits:
1st you have to understand what a “Switch” is and what a “Switch” does!!

14. Open Switch Closed Switch Electricity can’t move through.
Device will not work properly!!
Called an Open Circuit!!
Closed Switch
Electricity can move through.
Device will work properly.
Called a Closed Circuit!!

19. Connect the battery Replace the lightbulb Close the switch
Current will not flow in the circuit below. What must occur in order for the light bulb to turn on?
Connect the battery
Replace the lightbulb
Close the switch
Open the switch

20. Using Ohm’s Law and the Power Equation with Simple Circuits:
9 V
I - ???

21. 8 W
V =
2 A
V = 16 V

22. 12 V
R =
I = 2 A

23. 12 V
I = 2 A
P = ?????

24. What is the current in the circuit below?
2.5 V
.5 A
2 A
12.5 A
7.5 A
5 W

25. What is the Potential Difference of the battery below?
.5 V
2 V
15 V
50 V
I = 5 A
10 W

26. What Power is consumed by the circuit below?
V = 50 V
I = 5 A
10 W

27. **Build some circuits and turn on the lights!!
Independent work:
p #6,7
p #76 – 89
**Turn In!!!!**
**Build some circuits and turn on the lights!!