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Electricityverything in the world is made up of atoms.Each atom has smaller parts in it. One of thoseparts is called electrons. Electrons can move
from atom to atom. When an electron moves toa different atom, it causes another electron tohave to move. When electrons move quickly
from one atom to another is it calledElectricity!
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What is an electric
current?
For current to flowyou must have acomplete circuit
A power source is neededto create aPOTENTIAL DIFERENCE
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When these
conditions aremet free
electrons moveabout inside
the metal.
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Current Electricity!
Electric charges arecalled electriccurrent.
Free electronscontinuously move tospaces where
electrons aremissing.
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Circuits A series
circuitis a
circuit that hasonly one pathfor the current.
A parallelcircuithas more
than one pathfor current totravel.
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Series Circuits
Only one path for current to follow
User followed by another user (ie. Resistor
followed by a light)
...321 VVVV
equ
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+ -
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Lights in our homes are wired inparallel circuits.
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Static Electricity!
Charge that stays onan object
When something
gives up or gainselectrons
Does not move alonga wire or otherconductor
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Inside an atom,electrons have a
negative chargeandprotons have apositive charge.
These articles attracteach other.
A chargeis a measure of the extrapositive or negative particles that anobject has.
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The steady flow ofelectricity is calledan electric current.
A current will movealong a wire or apath called a
circuit.Circuitmeans to go
around.
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Conductor
.
A conductor is amaterial that
current can passthrough easily,
like metals
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ExamplesMetal
Paper clips
Silverware
Wires
Water
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ResistorA resistor is a
material thatresists, butdoesnt stop the
flow of current.
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InsulatorAn insulator is amaterial that
current cannotpass through
easily, like plastic.
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ChemicalChemical
changes
causeenergy
Batteries
Glow
sticks
Pop Rocks
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Electric Cell
An electric cellsupplies energy to
move chargesthrough a circuit, likea battery.
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EXAMPLESGenerator
Robots
Trains
Windmill
Motorcycles
http://images.google.com/imgres?imgurl=http://www.bugwing.com/bunkiehd.jpg&imgrefurl=http://www.bugwing.com/bikehistory.htm&h=318&w=425&sz=60&tbnid=W7nBoPHMF1YJ:&tbnh=91&tbnw=122&start=47&prev=/images%3Fq%3Dmechanical%2Bthings%26start%3D40%26hl%3Den%26lr%3D%26rls%3DGGLD,GGLD:2004-37,GGLD:en%26sa%3DN7/31/2019 Aekta Elec
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Amperes are the rate at which electricity flows through a wire or piece of machinery.
When you open a faucet on a kitchen sink, water flows out at a certain rate. The samething occurs when you turn on an appliance. Electricity flows at a certain rate. This isamperes. Watts are the amount of energy a device uses in performing its function. Toget watts, you multiply volts x amps. Example: vacuum cleaner draws 12 amps. 120volts x 12 amps= 1440 watts. To get amperes, divide watts by volts. Example, 100 wattlight bulb. 100 watts / 120 volts= 0.833 amps.
To use the water analogy: the size of the hole the water comes out is the "amps", theamount of pressure behind the hole is the "volts", and the combination of how muchwater comes out at a given pressure is "watts", or horsepower -- the measure of howmuch work can be done.
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Volts=Current (I) x Resistance (R)
=
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