1. BIG electricity Review

2. Models of electricity
Particle Theory
Protons
Neutrons
Electrons

3. Static Electricity
Buildup of electrons
Charges do not move

4. Insulators and Conductors
Material where a charge is built up on the place it was rubbed
Charges do not move freely on or through the material
Plastic
Glass
rubber
Conductor
Material where a charge can move freely
Copper
Silver
Iron

5. Charges Positive MORE PROTONS than electrons Negative
MORE ELECTRONS than protons
Neutral
EQUAL AMOUNTS of protons and electrons

6. Laws of electrical charge
Two objects with a like charge will always repel one another
Two objects of opposite charge will always attract each other
Neutral objects
Attracted by charged objects

7. Types of charges Charging by friction Transfer by contact
Transferred by rubbing action
Transfer by contact
One object is charged and the other is neutral
Extra electrons are transferred from one object to the other
Charging by Induction
Charged object comes close to neutral object
Object is grounded and loses extra electrons
Becomes charged as well

8. Current Electricity Q- Amount of Charge- Coulombs- C
I- Current- Amperes (Amps)- A
T- Time- Seconds- S

9. Example
How much charge would there be in a circuit if 10,000 amps of charge flow past a point in 2 hours?
How many amps would a circuit have if 500 coulombs of charge past through a point in a circuit in 5 seconds?
How many seconds would it take for 200 coulombs of charge were flowing at 100 amps.

10. Voltage Electric potential energy Stored energy
Electric potential difference
Difference in amount of charge at one point compared to another

11. Electric potential difference=
Voltage

12. Voltage E- Potential Energy- Joules- J
Q- Amount of Charge- Coulombs- C
V- Potential Difference- Volts- V

13. If a power source puts out 800 joules of electricity, and this causes 40 coulombs of charge to pass through a circuit, what is the potential difference created by the circuit?

14. Resistance
Resistance
The ability to slow down flow of electrons

15. V- Potential Difference- voltage- V
I- Current- Amperes (Amps)- A
R- Resistance-Ohms- Ω

16. Parts of a Circuit
Load
Causes resistance in a circuit and preforms an action
Light (Lamp)
Motor
Switch
Interrupts the flow of electrons
Power Source
Battery
Provides a constant flow of electrons

17. Series Circuits Resistance increases as more loads are added
As resistance increases- current decreases
Current is the same in all the parts of the circuit
If one part of the circuit is broken the current stops flowing
When batteries are placed in series- voltage increases

18. Parallel Circuits
When multiple loads are connected in a way where there multiple pathways for current to flow
If one light goes out, other lights will stay on
Each time a load is added current increases
Batteries connected in parallel have the same amount of voltage

19. Draw a series and a parallel circuit

20. Power P- Power- Watts- w I- Current- Amperes (Amps)- A
V-Potential Difference- Volts- V

21. Example
How much power is used if a 120v stereo has 10 amps of current?
If 1kw of power was used by a 100 amp line, what would the potential difference be?

22. Energy consumption P-Power- Watts or Kilowatts- W or kW
E- Energy- Joules or Kilowatt hours- J or kWh
P-Power- Watts or Kilowatts- W or kW
T- Time- Seconds or Hours- s or h

23. Meter Reading

24. Electrical Safety

25. Electromotive Force Electromagnetism Photoelectric Thermoelectric
Generators
turbines
Photoelectric
Photocells
Solar panels
Thermoelectric
Thermopanels
Thermocouples
Piezoelectric
BBQ lighter
Electrochemical
Batteries