conductors and insulators
TRANSCRIPT
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Conductors and insulators
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When it comes to the flow of electric current, all materials fall into three categories:
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When it comes to the flow of electric current, all materials fall into three categories:
•insulators
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When it comes to the flow of electric current, all materials fall into three categories:
•insulators
•conductors
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When it comes to the flow of electric current, all materials fall into three categories:
•insulators
•conductors
•resistors
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Insulator –Any material that does not allow electric current to pass through it
•plastic
•rubber
•glass
•like the protective coating on wires
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Insulator –Any material that does not allow electric current to pass through it
•plastic
•cloth
•wood
•like the protective coating on wires
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Insulator –Any material that does not allow electric current to pass through it
•plastic
•rubber
•glass
•cloth
•wood
•like the protective coating on wires
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Insulator –Any material that does not allow electric current to pass through it
•plastic
•rubber
•glass
•cloth
•wood
•like the protective coating on wires
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Insulator –Any material that does not allow electric current to pass through it
•plastic
•rubber
•glass
•cloth
•wood
•like the protective coating on wires
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Insulator –Any material that does not allow electric current to pass through it
•plastic
•rubber
•glass
•cloth
•wood
•like the protective coating on wires
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Insulators like plastic and rubber are used as a covering for electric wires.
This makes electric wires safer to handle because the insulator protects you from the current.
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Conductor –
insulator conductor
Any material that allows electric current to pass through it
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Conductor –
•copper
insulator conductor
Any material that allows electric current to pass through it
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Conductor –
•copper
•aluminum
insulator conductor
Any material that allows electric current to pass through it
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Conductor –
•copper
•aluminum
•steel
insulator conductor
Any material that allows electric current to pass through it
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Conductor –
•copper
•aluminum
•steel
•any metal
insulator conductor
Any material that allows electric current to pass through it
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Conductive material (metal) is used for wires that will carry electricity.
insulator
conductor
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A material or a device that allows some current to pass but converts some of the current to another form of energy.
Resistor
Light energy
Motion energy
Heat energy
Sound energy
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into light energy
Motion energy
eat energySound
energy
These appliances have resistors that convert electrical energy into
light energy.
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Light energy
Heat energy
Sound energy
These appliances have resistors that turn electrical energy into
motion energy.
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Motion energy
Heat energy
Sound energy
These appliances have resistors that change electrical energy into
heat energy.
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These appliances have resistors that convert electrical energy into
sound energy.
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Useful electric current can only move through a path of conductive material.
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Useful electric current can only move through a path of conductive material.
This path is called a …..
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CircuitA path for electric current
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An electric circuit might be open or closed.
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Closed CircuitAn unbroken path for electric current (no gaps, current can flow).
The light is on
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Open CircuitA path for electric current that has a gap (no current can flow).
gap
The light is off
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Most electrical devices have a switch in the circuit to make it easy to close (turn on) and open (turn off) the circuit.
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Switch A tool to open and close a circuit
switch
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A circuit can also be opened and closed by touching two wires together.
Open circuit Closed circuitNo current can flow current can flow
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A circuit can also be closed by touching those two wires to a conductor.
ed circuitcurrent can flow
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