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What is electric power?
Electric power is electric particles moving
through metal, semiconductor or graphite and
special fluids (electrolysis). Some kind of gas
are able to conduct inspecial cases with much
power.
Electric power in the air (luft), metal (metal)
and fluid (væske)
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There is tree importent kind of electric
particles
                                                
                                                  
                                                  
                                                  
                       Elevtricity in fluide 
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Some are much worse. It is semiconductores
(elements, used to make diodes, transistor etc.
For electricician devices). Some examples
Electric power are not moving just as well
through all substances. It work best in, what we
call conduktors (as metal and a saline solution).
Metalwires
Halvledere
Isolator
At last some substances are not able to conduct
electricity. We call these for isolatores (like
glas and plastic)
Taken out of radios and thinks like that.
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Voltage or potential difference or what makes
the particles moves Something has to push the
electric particles through the wires, air or
fluids a kind of compressor. A battery or
generator (dynamo).The pumping press in a
battery is measured in Volt (V) with a voltmeter.
This pressure we call voltage or potential
difference.
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Current intensityHow many particles per
secund?If the pressure is going up (more
voltage) the particles will move faster, and more
particles will pass through the wire. How many
electric particles streams through the wire
measures in ampere (A) with an ammeter.
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ResistanceIt can be difficult for the electric
particles to move.In some wires/material the
particles cant move wery well. They makes
resistance against the power. There has to be
more pressure (more voltages) to press enough
particles through or more particles
(ampere). Resistance measures in ohm (O).
Ohmmeter
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  De tre grundlæggende enheder i forbindelse med
elektricitet
  De tre grundlæggende enheder i forbindelse med
elektricitet
The tree basic units about electricity
  Voltage (U) measured in volt (V).   Current
intensity (I) measures in ampere (A).
  Resistance (R) measures in ohm (?)
For these tree units you can use Ohms law U
R I
Mellem de tre begreber er der en nøje sammenhæng
Ohms lov
Mellem de tre begreber er der en nøje sammenhæng
Ohms lov
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Effekt (Watt)

• An electrician device like a bulb you can see
  that it is maybee 60 W or 600 W. We call it the
  effect of the device. This information tells you
  how much electrician energy the device use. The
  unit is watt (W)

A 600 W device uses 10 times as much electrician
power as a 60 W device at the same time.
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Ohms law
U is volt. Potential difference abbreviates
V. I is Ampere. It is the number of electrician
particles a circuit uses abbreviates A. R is
Ohm. It is the ressistance in the circuit
abbreviates O. P is Watt. Watt is the
electrician power, abbreviates W.
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Produktion of electric power
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Energy flow

• From where do we get energy?

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Denish energy flow year 2003
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Energy sources 1999
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Energy sources 1999
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Powerstation
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Oil refinery
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Refining oil
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Temperatures for evaporation
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Refining oil