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Electrical Power The rate at which electrical energy is converted to another form of energy. Thermal, Light, Motion…
Electrical Power Power = current x voltage P = I x V The units for power: watts (W)
Electrical Power All appliances have a power rating to tell how much power it uses. [http://www.nationalwholesaletools.com/index.asp?PageAction=VIEWPROD&ProdID=357]
Standard Voltage in the US is 120 V: [http://www.northpower.com.au/wrs/res2.nsf/images/appliances/$file/Appliance2.jpg] P = 240 W P = 2.0 A x 120 V
Electrical Energy The amount of power that is used over a given time. Energy = Power x Time
Electrical Energy Electric companies normally use the kilowatt-hour to charge for energy. Remember: 1 kilowatt is 1000 watts!
MN is about 12 cents/kWh (When Taxes are Included)
[http://www.think-energy.net/_85256A170068279F_li_meter3a__file_meter3a.jpg] = $82.56 x $0.12 per kWh 688 kWh used May 1st May 31st
Electrical Energy Example: How much does it cost to run an XBOX 360 (160 W) for 3 hours a day for an entire month? 30 days x 3 hours = 90 hours
Electrical Energy Energy = 160 W x 90 h Energy = 14400 Wh or 14.4 kWh Each kWh in MN is 11 cents so… 14.4 kWh x $0.11 = $1.58 per month Click Here for Xcel Energy Calculators
Average % of Energy Usage in a Home
Electrical Power & Energy Chapter 7-3. Electrical Power F Power is the rate at which work is done F Electrical energy is easily converted into other forms.
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Power. Your Utilization of Electricity Have you ever heard the word Watt before? Have you ever used the word Kilowatt before? When? When a person is speaking.
Electrical energy The rate at which electrical energy is moved through a circuit is given in terms of power. The unit for electric power is the Watt (W)
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Connect the appliance to the power rating using an arrow! Appliance Kettle Iron Television Hair dryer Power rating (W) 1100W 65W 1800W 2000W.
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The rate at which a device converts energy. The unit for power is the “watt” (we also use kilowatt and gigawatt depending upon the size) There are two.
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