ckt04 energy and power - prince of songkla...
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![Page 1: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/1.jpg)
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Electric Circuit 1
241241--205205Computer Engineering Circuits Computer Engineering Circuits
Energy and PowerEnergy and Power
DK
44
Electric Circuit 2
Chapter 4Chapter 4Energy and PowerEnergy and Power
![Page 2: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/2.jpg)
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Electric Circuit 3
OUTLINE
Electric Circuit 4
Energy and Power
![Page 3: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/3.jpg)
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Electric Circuit 5
Energy and PowerEnergy (W) is the ability to do work.Power (P) is the rate at which energy is used.
Electric Circuit 6
Energy and Power
![Page 4: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/4.jpg)
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Electric Circuit 7
Energy and Power
Electric Circuit 8
and
Energy and Power
W = Pt Joule
![Page 5: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/5.jpg)
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Electric Circuit 9
The Kilowatt-hour (KWh) Units of EnergyThere is another way to express enery.Since power is expressed in watts and time, unit of energy can called watt-second (Ws), watt-hour (Wh), and kilowatt-hour (kWh).
When we use a kilowatt-hour of energy means we use one thousand watts of power for one hour.
Electric Circuit 10
The Kilowatt-hour (KWh) Units of Energy
![Page 6: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/6.jpg)
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Electric Circuit 11
Power in Electric Circuits
Electric Circuit 12
Power in Electric Circuits
![Page 7: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/7.jpg)
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Electric Circuit 13
Power in Electric Circuits
Electric Circuit 14
Resistor Rating
![Page 8: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/8.jpg)
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Electric Circuit 15
Resistor Rating
Electric Circuit 16
Resistor Rating
![Page 9: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/9.jpg)
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Electric Circuit 17
Resistor Rating
Electric Circuit 18
Power Supply
![Page 10: CKT04 Energy and Power - Prince of Songkla Universityfivedots.coe.psu.ac.th/~montri/Teaching/241-205/CKT04.pdf · 2007. 8. 22. · Since power is expressed in watts and time, unit](https://reader035.vdocument.in/reader035/viewer/2022081620/6115acbddbbfa25e1b72cde0/html5/thumbnails/10.jpg)
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Electric Circuit 19
Ampere-hour Ratings of Battries
Electric Circuit 20
Power Supplies Efficiency
Power Loss
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Electric Circuit 21
Power Supplies Efficiency
Electric Circuit 22