1. How do we describe current electricity?

2. Electric Current
The flow of electrons through a conductor.

3. Electric Current Examples
Electric hair straightner.
Hair dryer
Microwave
Cell phone
Cell charger

4. Conductor
A material that easily allows electrons to flow through it.

5. Conductor Examples
Copper wire
All metals
Water

6. Insulators
A material that does not allow electrons to flow through it.

7. Insulators Example
Plastic
Rubber
Glass
Wax
Air

8. Alternating Current
The electrons alternate or change direction of flow. The abbreviation is AC.

9. Alternating Current Electricity from a wall plug.
Electricity from a generator.

10. Direct Current
The electrons flow in one direction. The abbreviation is DC.

11. Direct Current
Batteries

12. Voltage
Measure of the potential energy available to the circuit. The unit of measure is Volt and the symbol is V.

13. Voltage Car battery – 12 volts D cell battery – 1.5 volts
House circuit – 120 volts except for the clothes dryer = 240 volts.

14. Current
The flow of electrons in a circuit that carries energy. The symbol is I and the unit of measure is ampere (A).

15. Resistance
The property of materials to resist the flow of current. The symbol is R and the unit of measure is Ohms (Ω).

16. Resistance
Resistors
Potentiometers

17. Series Circuit
Current only has one path to flow

18. Parallel Circuit
Current has two or more paths to follow

21. Charges
Opposite charges __________
Like charges __________

22. Charges
If Balloon B is Negative
Balloon A is ____
Balloon C is ____

23. Charges
If Balloon B is negative
Balloon A is _____
Balloon C is _____

24. Transferring Charges
An uncharged metal drink can is attached to a Styrofoam cup (which acts as an insulating stand). A negatively charged balloon is brought near the pop can. While the balloon is held near, the can is touched. When the hand is pulled away, the pop can is charged.

25. Transferring Charges
This process is known as charging by_____.

26. Transferring Charges
When the balloon is held near to the pop can (and before being touched by the hand), the distribution of charge on the drink can is best depicted by diagram _____.

27. Transferring Charges
When the drink can is touched by the hand, ______ move from the ______ to the _______.
a. protons, hand, can
b. protons, can, hand
c. electrons, hand, can
d. electrons, can, hand

28. Transferring Charges
This process causes the can to acquire a _____ charge.
Negative
Positive
Neutral