Conductors Insulators Electricity 2 types of electricity Static

Electricity ¡ 2 types of electricity Static electricity: when electrical charges are at rest

Electric Current ¡ Electric current is the orderly flow of electrons through a conductor.

Conductors: Substance that allows electric current to pass. Most metals. ¡ Ex. - Metal

Insulators: Substance that does NOT allow electric current to pass. Most nonmetals. ¡ Ex.

Semi-Conductor ¡ ¡ ¡ Substance that partially allow electric current to pass are semi-conductors.

Wood, Rubber, Vinyl, Glass, Plastics are not a good conductor Water, is a good

¡ Conductance on: of a wire depends ¡Length ¡Diameter ¡Temp ¡Material Copper is excellent

Which is a better conductor? Plastic Wood Copper Iron Which metal wire has the

Which wire is the best conductor? Wood 55 o. C SHORT THICK COLD Copper

¡ ¡ Copper and Aluminum are excellent conductors Wires that are: l l l

Key Points to Remember ¡ ¡ ¡ Conductors – creates an electrical current Insulators

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Conductors & Insulators

Electricity ¡ 2 types of electricity Static electricity: when electrical charges are at rest (as we have already covered). Current electricity: when electrical charges are in motion (in a wire loop) causing an electric current to flow.

Electric Current ¡ Electric current is the orderly flow of electrons through a conductor. ¡ Electron flow: the direction the electrons actually move (- to +) ¡ Conventional current: the direction positive particles would flow if they could move (+ to -). BUT THEY DON’T MOVE! Only the electrons move.

Conductors: Substance that allows electric current to pass. Most metals. ¡ Ex. - Metal wires (ex. Aluminum or copper) or graphite rods ¡

Insulators: Substance that does NOT allow electric current to pass. Most nonmetals. ¡ Ex. - Plastic, Wood, Paper, Rubber, Glass, Ceramics ¡

Semi-Conductor ¡ ¡ ¡ Substance that partially allow electric current to pass are semi-conductors. Metal alloys are a mixture of metals or metals and non-metal products. Ex – Steel (iron and carbon), electrum (silver and copper), brass (copper and zinc), stainless steel (steel, chromium and nickel), white gold (gold, nickel, and palladium), and pewter (lead and copper)

Wood, Rubber, Vinyl, Glass, Plastics are not a good conductor Water, is a good conductor (sort of) Copper, Aluminum, Zinc, Iron, Lead are GOOD conductors Steel, Brass and Pewter are GOOD semi-conductor

¡ Conductance on: of a wire depends ¡Length ¡Diameter ¡Temp ¡Material Copper is excellent l Metals better than non-metals l

Which is a better conductor? Plastic Wood Copper Iron Which metal wire has the best conductance?

Which wire is the best conductor? Wood 55 o. C SHORT THICK COLD Copper 25 o. C Copper 55 o. C Aluminum 25 o. C Copper 5 o C

¡ ¡ Copper and Aluminum are excellent conductors Wires that are: l l l SHORT THICK COLD have a high level of conductance

Key Points to Remember ¡ ¡ ¡ Conductors – creates an electrical current Insulators – prevent an electrical current from happening Semi-Conductors – partially create an electrical current