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Difference between revisions of "Electrical Appliance"

(→‎Energy Usage of Appliances)
(→‎Key Stage 3)
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: Energy = 2.5 x 0.75
 
: Energy = 2.5 x 0.75
 
: Energy = 1.875kilowatt-hours
 
: Energy = 1.875kilowatt-hours
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|}
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==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 Cell|electrical cells]] to power them.
 +
 +
===Energy Transfers===
 +
{| class="wikitable"
 +
|+ [[Energy]] is always [[Energy Transfer|transferred]] to the appliances by [[electricity]].
 +
|-
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|[[File:FilamentBulbClipart.png|center|50px]]
 +
|[[File:EnergySavingBulbClipart.png|center|50px]]
 +
|[[File:VacuumCleanerClipart.png|center|200px]]
 +
|[[File:IronClipart.png|center|200px]]
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the [[Electrical Bulb|bulb]].
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the [[Electrical Bulb|bulb]].
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Kinetic Energy Store]] of the [[air]] and the [[Thermal Energy Store]] of the [[motor]].
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the [[metal]] pad.
 +
|-
 +
|[[File:KettleClipart.png|center|200px]]
 +
|[[File:TVClipart.png|center|200px]]
 +
|[[File:FridgeClipart.png|center|200px]]
 +
|[[File:ToasterClipart.png|center|200px]]
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the [[water]] and [[Electrical Kettle|kettle]].
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Radiation|Energy Transfer by radiation]] to the surroundings (by [[light]] and [[sound]]).
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the 'heat pump' at the back of the [[refrigerator]].
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the bread/toast.
 +
|-
 +
|[[File:OvenClipart.png|center|200px]]
 +
|[[File:MicrowaveClipart.png|center|200px]]
 +
|[[File:WashingMachineClipart.png|center|200px]]
 +
|[[File:HairDryerClipart.png|center|200px]]
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the oven and food.
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the food.
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] of the [[Electrical Bulb|bulb]].
 +
| style="height:20px; width:200px; text-align:center;" |[[Electricity|Electrical energy transfer]] → [[Thermal Energy Store]] and [[Kinetic Energy Store]] of the [[air]].
 
|}
 
|}

Revision as of 17:27, 2 February 2019

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. 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
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.

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

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

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.

Energy Transfers

Energy is always transferred to the appliances by electricity.
FilamentBulbClipart.png
EnergySavingBulbClipart.png
VacuumCleanerClipart.png
IronClipart.png
Electrical energy transfer → Thermal Energy Store of the bulb. Electrical energy transfer → Thermal Energy Store of the bulb. Electrical energy transfer → Kinetic Energy Store of the air and the Thermal Energy Store of the motor. Electrical energy transfer → Thermal Energy Store of the metal pad.
KettleClipart.png
TVClipart.png
FridgeClipart.png
ToasterClipart.png
Electrical energy transfer → Thermal Energy Store of the water and kettle. Electrical energy transfer → Energy Transfer by radiation to the surroundings (by light and sound). Electrical energy transfer → Thermal Energy Store of the 'heat pump' at the back of the refrigerator. Electrical energy transfer → Thermal Energy Store of the bread/toast.
OvenClipart.png
MicrowaveClipart.png
WashingMachineClipart.png
HairDryerClipart.png
Electrical energy transfer → Thermal Energy Store of the oven and food. Electrical energy transfer → Thermal Energy Store of the food. Electrical energy transfer → Thermal Energy Store of the bulb. Electrical energy transfer → Thermal Energy Store and Kinetic Energy Store of the air.
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