Difference between revisions of "Electrical Appliance"
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|+ The Power ratings of some electrical appliances. | |+ The Power ratings of some electrical appliances. | ||
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| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:center;" |'''Filament Bulb''' |
A 60[[Watt]] filament bulb may be used for 8 hours a day. Calculate the [[energy]] in kilowatt-hours. | A 60[[Watt]] filament bulb may be used for 8 hours a day. Calculate the [[energy]] in kilowatt-hours. | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:center;" |'''Energy Saving Bulb''' |
A 25[[Watt]] energy saving bulb may be used for 8 hours a day. Calculate the [[energy]] in kilowatt-hours. | A 25[[Watt]] energy saving bulb may be used for 8 hours a day. Calculate the [[energy]] in kilowatt-hours. | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:center;" |'''Kettle''' |
A 2000[[Watt]] kettle may be used for 30 minutes a day. Calculate the [[energy]] in kilowatt-hours. | A 2000[[Watt]] kettle may be used for 30 minutes a day. Calculate the [[energy]] in kilowatt-hours. | ||
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| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:left;" | |
: Power = 60W = 0.060kW | : Power = 60W = 0.060kW | ||
: Time = 8 hours | : Time = 8 hours | ||
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: Energy = 0.48kilowatt-hours | : Energy = 0.48kilowatt-hours | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:left;" | |
: Power = 25W = 0.025kW | : Power = 25W = 0.025kW | ||
: Time = 8 hours | : Time = 8 hours | ||
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: Energy = 0.20kilowatt-hours | : Energy = 0.20kilowatt-hours | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:left;" | |
: Power = 2000W = 2.0kW | : Power = 2000W = 2.0kW | ||
: Time = 30 minutes = 0.5hours | : Time = 30 minutes = 0.5hours | ||
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: Energy = 1.0kilowatt-hours | : Energy = 1.0kilowatt-hours | ||
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| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:center;" |'''Television''' |
A 250[[Watt]] television is left on for 3 hours each day. Calculate the [[energy]] in kilowatt-hours. | A 250[[Watt]] television is left on for 3 hours each day. Calculate the [[energy]] in kilowatt-hours. | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:center;" |'''Refrigerator''' |
A 200[[Watt]] refrigerator is on for 24 hours each day. Calculate the [[energy]] in kilowatt-hours. | A 200[[Watt]] refrigerator is on for 24 hours each day. Calculate the [[energy]] in kilowatt-hours. | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:center;" |'''Oven''' |
A 2500[[Watt]] oven is used for 45 minutes each day. Calculate the [[energy]] in kilowatt-hours. | A 2500[[Watt]] oven is used for 45 minutes each day. Calculate the [[energy]] in kilowatt-hours. | ||
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| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:left;" | |
: Power = 250W = 0.25kW | : Power = 250W = 0.25kW | ||
: Time = 3 hours | : Time = 3 hours | ||
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: Energy = 0.75kilowatt-hours | : Energy = 0.75kilowatt-hours | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:left;" | |
: Power = 200W = 0.20kW | : Power = 200W = 0.20kW | ||
: Time = 24 hours | : Time = 24 hours | ||
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: Energy = 4.8kilowatt-hours | : Energy = 4.8kilowatt-hours | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:250px; text-align:left;" | |
: Power = 2500W = 2.5kW | : Power = 2500W = 2.5kW | ||
: Time = 45 minutes = 0.75 hours | : Time = 45 minutes = 0.75 hours | ||
Revision as of 18:14, 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
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| Kettle | Television | Refrigerator | Toaster |
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| 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
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| Filament Bulb ~ 60Watts | Energy Saving Bulb ~ 25Watts | Vacuum Cleaner ~ 800Watts | Iron ~ 1100Watts |
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| Kettle ~ 2000Watts | Television ~ 250Watts | Refrigerator ~ 200Watts | Toaster ~ 1500Watts |
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| 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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