Slide 1

Electricity

abcdefghijklmnopqrstuvwxyzKey Concepts Electrons (e- )are negatively charged particles of an atom. Protons are positively charged particles of an atom. Atoms usually have equal number of electrons and protons and are considered neutral (the positive charges cancel out the negative charges.) Sometimes electrons can be added or removed. If e- are added, the atom will have more s than +s, and therefore will be negatively charged. If e- are removed, the net charge will be positive.= Proton= ElectronNumber of protons = Number of electrons = Net Charge = 330AtomNeutral= Proton= ElectronNumber of protons = Number of electrons = Net Charge = 34-1AtomNegative= Proton= ElectronNumber of protons = Number of electrons = Net Charge = 32+1AtomPositiveStatic Electricity When two objects have the same charge (positive or negative) they will repel each other. If the charges of two objects differ (one positive, on negative), they will attract each other.Key Concepts Sometimes objects can remain neutral overall, but can have their charges distributed unevenly. If a charged object is brought close to another (not touching), the charged object can draw the opposite charges of the neutral object toward the side of the charged object. This is known as induction.Static ElectricityKey ConceptsLIGHTNING

Lightning is caused by static charges that jump. When the clouds move quickly in the sky, they become negatively charged. The negative charges in the clouds draw positive charges on the surface toward the sky. When the charges build to a point when they cant remain static (still), they discharge creating lightning bolts.

Electrical Energy is the flow of electrons from one point to another. A conductor allows electrons to flow easily. Examples are most metals such as gold, silver, and copper. A insulator does NOT allow electrons to flow easily. Examples are most nonmetals such as glass, wood, plastic, and rubber. An electrical current is produced when electrons flow through a conductor.Electrical EnergyKey ConceptsTypical WireInsulator (Plastic)Conductor (Metal) An Electrical circuit is a complete path for the flow of electricity. There are two types of electrical circuits: Series Circuit all parts of the circuit are connected one after the other. Since there is only one path for the electricity to flow, if one component in the series breaks the circuit, the entire circuit is broken and the electrons cant get back to their source. Parallel Circuit Each part of the circuit has its own path so that if own component breaks the circuit, the other components still have a path for the electrons to flow back to the source.Electrical CircuitsKey ConceptsSERIESCIRCUIT

Series Circuit

Series Circuit

Series CircuitParallelCIRCUITAbcdefghijklmnopqrsuvwxyz

Parallel CircuitParallel Circuit

Parallel Circuit