1. Electrical Charge and Static Electricity
Things that go ZAP!!!!!!!!

2. Electric Charge
Electrical energy is the energy associated with electric charges
An electric charge is a property that causes subatomic particles such as protons and electrons to attract or repel each other
Protons have a positive charge (+)
Electrons have a negative charge (-)

3. Electric Charge
When an atom gains an electron it is negatively charged
When an atom loses an electron it is positively charged
A net electric charge is produced when there is too many or too few electrons

4. Coulomb The SI unit for electric charge is the coulomb
It takes 6.24 x 1018 electrons to make 1 coulomb
A lightning bolt is 10 to 20 coulombs
A flash camera uses about coulombs to produce a flash

5. Electric Forces
Like charges repel each other where opposite charges attract
Electric force is the force of attraction or repulsion between electrically charged objects
If you double the electric charge of an object you double the electric force
If you double the distance between two objects the electric force is one-fourth as strong

6. Electric Fields
The electric field is the effect an electric charge has on other charges in the space around it
The strength of an electric field depends on the amount of charge that produces the field and the distance from the charge

7. Static Electricity and Charging
Static electricity includes how charge is transferred between objects
Law of conservation of charge states that the total charge in an isolated system is constant
Charge can be transferred by friction, conduction and induction

8. Friction
An example of charging by friction is rubbing a balloon against your hair
The electrons will move from your hair to the balloon
The balloon now has a negative charge and your hair has a positive charge

9. Conduction
A Van de Graff generator ( a charged metal sphere) will cause a charge by contact
There is a reduction in the charge of the Van de Graff generator because some has gone to the person’s hair
Your hair will stand on end due to the charge

10. Induction
When you go to touch a metal doorknob after walking across a carpet is induction
Your hand has a negative charge from walking across the carpet
The electrons in your hand repel the electrons in the doorknob
Induction is a transfer of charge between materials without contact

11. Static Discharge
Static discharge occurs when a pathway through which charges can move forms suddenly
When you go to touch the doorknob the air between your finger and the knob is charged
This allows electrons to flow from your hand to the doorknob