Difference between revisions of "Electrical Appliance"
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: Power = 60W = 0.060kW | : Power = 60W = 0.060kW | ||
: Time = 8 hours | : Time = 8 hours | ||
+ | : Energy = Power x time | ||
: Energy = 0.060 x 8 | : Energy = 0.060 x 8 | ||
: Energy = 0.48kilowatt-hours | : Energy = 0.48kilowatt-hours | ||
| style="height:20px; width:200px; text-align:left;" | | | style="height:20px; width:200px; text-align:left;" | | ||
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: Power = 25W = 0.025kW | : Power = 25W = 0.025kW | ||
: Time = 8 hours | : Time = 8 hours | ||
+ | : Energy = Power x time | ||
: Energy = 0.025 x 8 | : Energy = 0.025 x 8 | ||
: Energy = 0.20kilowatt-hours | : Energy = 0.20kilowatt-hours | ||
| style="height:20px; width:200px; text-align:left;" | | | style="height:20px; width:200px; text-align:left;" | | ||
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: Power = 2000W = 2.0kW | : Power = 2000W = 2.0kW | ||
: Time = 30 minutes = 0.5hours | : Time = 30 minutes = 0.5hours | ||
+ | : Energy = Power x time | ||
: Energy = 2.0 x 0.5 | : Energy = 2.0 x 0.5 | ||
: Energy = 1.0kilowatt-hours | : Energy = 1.0kilowatt-hours | ||
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| style="height:20px; width:200px; text-align:left;" | | | style="height:20px; width:200px; text-align:left;" | | ||
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: Power = 250W = 0.25kW | : Power = 250W = 0.25kW | ||
: Time = 3 hours | : Time = 3 hours | ||
+ | : Energy = Power x time | ||
: Energy = 0.25 x 3 | : Energy = 0.25 x 3 | ||
: Energy = 0.75kilowatt-hours | : Energy = 0.75kilowatt-hours | ||
| style="height:20px; width:200px; text-align:left;" | | | style="height:20px; width:200px; text-align:left;" | | ||
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: Power = 200W = 0.20kW | : Power = 200W = 0.20kW | ||
: Time = 24 hours | : Time = 24 hours | ||
+ | : Energy = Power x time | ||
: Energy = 0.20 x 24 | : Energy = 0.20 x 24 | ||
: Energy = 4.8kilowatt-hours | : Energy = 4.8kilowatt-hours | ||
| style="height:20px; width:200px; text-align:left;" | | | style="height:20px; width:200px; text-align:left;" | | ||
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: Power = 2500W = 2.5kW | : Power = 2500W = 2.5kW | ||
: Time = 45 minutes = 0.75 hours | : Time = 45 minutes = 0.75 hours | ||
+ | : Energy = Power x time | ||
: Energy = 2.5 x 0.75 | : Energy = 2.5 x 0.75 | ||
: Energy = 1.875kilowatt-hours | : Energy = 1.875kilowatt-hours | ||
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Revision as of 18:13, 7 October 2018
Contents
Key Stage 2
Meaning
An electrical appliance is anything that needs electricity to work.
About Electrical Appliances
- Electrical appliances often have a plug to use the Mains Electricity.
- Some electrical appliances use electrical cells to power them.
Examples
Kettle | Television | Refrigerator | Toaster |
Oven | Microwave | Washing Machine | Hair Dryer |
Key Stage 3
Meaning
An electrical appliance is anything that needs electricity to work.
About Electrical Appliances
- Electrical appliances often have a plug to use the Mains Electricity.
- Some electrical appliances use electrical cells to power them.
Power Ratings
Filament Bulb ~ 60Watts | Energy Saving Bulb ~ 25Watts | Vacuum Cleaner ~ 800Watts | Iron ~ 1100Watts |
Kettle ~ 2000Watts | Television ~ 250Watts | Refrigerator ~ 200Watts | Toaster ~ 1500Watts |
Oven ~ 2500Watts | Microwave ~ 1000Watts | Washing Machine ~ 2500Watts | Hair Dryer ~ 600Watts |
Energy Usage of Appliances
- The amount of energy an appliance uses depends on the power rating and how long the appliance is used for.
- Energy usage for appliances is measured in kilowatt-hours. This means all power ratings need to be in kilowatts and time should be in hours.
- Energy can be calculated with the equation: Power = Energy x time
Filament Bulb
A 60Watt filament bulb may be used for 8 hours a day. Calculate the energy in kilowatt-hours. |
Energy Saving Bulb
A 25Watt energy saving bulb may be used for 8 hours a day. Calculate the energy in kilowatt-hours. |
Kettle
A 2000Watt kettle may be used for 30 minutes a day. Calculate the energy in kilowatt-hours. |
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Television
A 250Watt television is left on for 3 hours each day. Calculate the energy in kilowatt-hours. |
Refrigerator
A 200Watt refrigerator is on for 24 hours each day. Calculate the energy in kilowatt-hours. |
Oven
A 2500Watt oven is used for 45 minutes each day. Calculate the energy in kilowatt-hours. |
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