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Understanding Electric Power: Basics and Applications

Learn about electric power, conductors, semiconductors, insulators, voltage, current intensity, resistance, Ohm's law, and energy flow in this comprehensive guide.

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Understanding Electric Power: Basics and Applications

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  1. 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)

  2. There is tree importent kind of electric particles: Elevtricity in fluide 

  3. 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.

  4. 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.

  5. 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.

  6. ResistanceIt can be difficult for the electric particles to move.In some wires/material the particles can’t 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 (Ω). Ohmmeter

  7. 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 ”Ohm’s 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

  8. 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.

  9. Ohm’s 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 abbreviatesΩ. P is Watt. Watt is the electrician power, abbreviates W.

  10. Produktion of electric power

  11. Energy flow • From where do we get energy?

  12. Denish energy flow year 2003

  13. Energy sources 1999

  14. Energy sources 1999

  15. Powerstation

  16. Oil refinery

  17. Refining oil

  18. Temperatures for evaporation

  19. Refining oil

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