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Difference between revisions of "Electrical Appliance"

(→‎Energy Usage of Appliances)
(→‎Energy Usage of Appliances)
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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:200px; text-align:center;" |
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| style="height:20px; width:200px; text-align:left;" |
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Energy = Power x time
+
: Energy = Power x time
−
Power = 60W = 0.060kW
+
: Power = 60W = 0.060kW
−
Time = 8 hours
+
: Time = 8 hours
−
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:center;" |
+
| style="height:20px; width:200px; text-align:left;" |
−
Energy = Power x time
+
: Energy = Power x time
−
Power = 25W = 0.025kW
+
: Power = 25W = 0.025kW
−
Time = 8 hours
+
: Time = 8 hours
−
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:center;" |
+
| style="height:20px; width:200px; text-align:left;" |
−
Energy = Power x time
+
: Energy = Power x time
−
Power = 2000W = 2.0kW
+
: Power = 2000W = 2.0kW
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Time = 30 minutes = 0.5hours
+
: Time = 30 minutes = 0.5hours
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Energy = 2.0 x 0.5
+
: Energy = 2.0 x 0.5
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Energy = 1.0kilowatt-hours
+
: Energy = 1.0kilowatt-hours
 
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|-
 
| style="height:20px; width:200px; text-align:center;" |Television
 
| style="height:20px; width:200px; text-align:center;" |Television
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A 2500[[Watt]] television is left on for 45 minutes each day.
 
A 2500[[Watt]] television is left on for 45 minutes each day.
 
|-
 
|-
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| style="height:20px; width:200px; text-align:center;" |
+
| style="height:20px; width:200px; text-align:left;" |
−
Energy = Power x time
+
: Energy = Power x time
−
Power = 250W = 0.25kW
+
: Power = 250W = 0.25kW
−
Time = 3 hours
+
: Time = 3 hours
−
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:center;" |
+
| style="height:20px; width:200px; text-align:left;" |
−
Energy = Power x time
+
: Energy = Power x time
−
Power = 200W = 0.20kW
+
: Power = 200W = 0.20kW
−
Time = 24 hours
+
: Time = 24 hours
−
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:center;" |
+
| style="height:20px; width:200px; text-align:left;" |
−
Energy = Power x time
+
: Energy = Power x time
−
Power = 2500W = 2.5kW
+
: Power = 2500W = 2.5kW
−
Time = 45 minutes = 0.75 hours
+
: Time = 45 minutes = 0.75 hours
−
Energy = 2.5 x 0.75
+
: Energy = 2.5 x 0.75
−
Energy = 1.875kilowatt-hours
+
: Energy = 1.875kilowatt-hours
 
|}
 
|}

Revision as of 18:02, 7 October 2018

Key Stage 2

Meaning

An electrical appliance is anything that needs electricity to work.

Singular Noun: Electrical Appliance
Plural Noun: Electrical Appliances

About Electrical Appliances

Electrical appliances often have a plug to use the Mains Electricity.
Some electrical appliances use electrical cells to power them.

Examples

KettleClipart.png
TVClipart.png
FridgeClipart.png
ToasterClipart.png
Kettle Television Refrigerator Toaster
OvenClipart.png
MicrowaveClipart.png
WashingMachineClipart.png
HairDryerClipart.png
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

The Power ratings of some electrical appliances.
FilamentBulbClipart.png
EnergySavingBulbClipart.png
VacuumCleanerClipart.png
IronClipart.png
Filament Bulb ~ 60Watts Energy Saving Bulb ~ 25Watts Vacuum Cleaner ~ 800Watts Iron ~ 1100Watts
KettleClipart.png
TVClipart.png
FridgeClipart.png
ToasterClipart.png
Kettle ~ 2000Watts Television ~ 250Watts Refrigerator ~ 200Watts Toaster ~ 1500Watts
OvenClipart.png
MicrowaveClipart.png
WashingMachineClipart.png
HairDryerClipart.png
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.
The Power ratings of some electrical appliances.
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.

Energy = Power x time
Power = 60W = 0.060kW
Time = 8 hours
Energy = 0.060 x 8
Energy = 0.48kilowatt-hours
Energy = Power x time
Power = 25W = 0.025kW
Time = 8 hours
Energy = 0.025 x 8
Energy = 0.20kilowatt-hours
Energy = Power x time
Power = 2000W = 2.0kW
Time = 30 minutes = 0.5hours
Energy = 2.0 x 0.5
Energy = 1.0kilowatt-hours
Television

A 250Watt television is left on for 3 hours each day.

Refrigerator

A 200Watt refrigerator is on for 24 hours each day.

Oven

A 2500Watt television is left on for 45 minutes each day.

Energy = Power x time
Power = 250W = 0.25kW
Time = 3 hours
Energy = 0.25 x 3
Energy = 0.75kilowatt-hours
Energy = Power x time
Power = 200W = 0.20kW
Time = 24 hours
Energy = 0.20 x 24
Energy = 4.8kilowatt-hours
Energy = Power x time
Power = 2500W = 2.5kW
Time = 45 minutes = 0.75 hours
Energy = 2.5 x 0.75
Energy = 1.875kilowatt-hours
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