Electric Charge &

Static ElectricityElectricity & Magnetism Chapter 2.1

Pages 46-53

Electric Charge

• All objects are made up of atoms

• Atoms consist of 3 parts1. Protons2. Electrons3. Neutrons

Electric Charge

• Ben Franklin described each part of the atom as having an electric charge

• Protons have a positive charge (+)

• Electrons have a negative charge (-)

• Neutrons have a neutral charge (neither + nor - )

Repel & Attract

• Charges that are the same repel one another or push each other away

• Charges that are opposite attract one another or pull each other together– The same rules apply to magnets

Electric Fields

• The force of electric charges can be felt for a distance

• An Electric Field is the area of force surrounding a charge

• Charged particles placed in an electric field will either repel or attract.

Electric Fields

Static Electricity

• Objects become charged by gaining or losing electrons– Protons are bound to the atom tightly

• Static Electricity is when charges build up on an object– Static means fixed or unmoving– Static charges do not flow

What to Work On

• Section 2.1 Review Questions• Page 53, Questions 1-4 and 6

DUE: Friday, 3/16

1 •Proton

2 •Electron

3 •Positive / Negative

4 •NeutronAtoms are made of 3 parts. Which

of these is NOT one of them?

1 •Proton, Neutron, Electron

2 •Electron, Proton, Neutron

3 •Neutron, Electron, Proton

4 •Electron, Neutron, ProtonPut the following parts in the correct

order: Negative, Neutral, Positive.

1 •Particles with the same charge repel

2 •Particles with the same charge attract

3 •Particles with opposite charges repel

Which of these statements is TRUE?

Transferring Charge

• Charges can be moved from one object to another in 3 different ways:

1. Friction moves electrons by rubbing two objects together

2. Conduction transfers electrons from a charged object through touch

3. Induction is when electrons move from an object because of electric fields.

Static Discharge

• When a negatively charged object and a positively charged object are brought together, electrons move until both have the same charge

• Static Discharge: Two charged objects will create a balanced charge.