18.1 Electric and Static Electricity Video


Electric Charge The property of that gives it the ability to attract and repel other matter.

have positive charges () • Atoms have negative charges ()

• If an gains or loses electrons it becomes electrically charged Electric Charge

The Atom Electric

Electric Forces Electric are the attraction and repulsion of electric charges

Law of . Like charges repel . Opposite charges attract

The strength of electric forces depends on the strength of the electric charges Electric Fields

Electric Fields Electric Fields are the space around the charge particle that it can affect.

. An electric fields strength is dependent on two things:

1. Strength of the charge 2. Distance from the charge

Static Electricity Static Electricity is the study of the behavior of electric charges, including how charges are transferred between objects.

. When walking across carpet with socks on your body collects negative charges

. Touching another object like a doorknob or your friend causes negative charge (electrons) to “jump” to the positive object Static Electricity Transferring Charges

Three ways to transfer a charge:

1. 2. Conduction (Direct Contact) 3. Induction Transferring Charges

Friction Charge transferred by objects rubbing together

Example Rubbing a balloon on your hair Transferring Charges

Conduction Charge transferred by direct contact

Example A rod touching a charged object Transferring Charges

Induction Charge transferred from a distance

Example Charged hand near a doorknob Transferring Charges

http://www.youtube.com/watch?v=-n1pSHzdahc 18.1 Assessment

Question #1 How is a net electric charge produced?

An excess or shortage of electrons produces a net electrical charge.

Question #2 What determines whether charges attract or repel?

. Like charges will repel . Opposite charges will attract 18.1 Assessment

Question #3 Name two factors that affect the strength of an electric .

1. Net Charge 2. Distance from the charge

Question #4 List three methods of charge transfer.

1. Friction 2. Conduction (Direct Contact) 3. Induction 18.1 Assessment

Question #5 What is the Law of Electrostatics?

Like charges repel and opposite charges attract