Difference between revisions of "Electrical Bulb"
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| style="height:20px; width:200px; text-align:center;" |The symbol for an '''electrical bulb'''. | | style="height:20px; width:200px; text-align:center;" |The symbol for an '''electrical bulb'''. | ||
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| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | [[File:BulbSymbol.png|right|300px|thumb|The symbol for an '''bulb'''.]] | ||
| + | An '''electrical bulb''' is a [[circuit]] [[Electrical Component|component]] that gives out [[light]] when [[electricity]] goes through it. | ||
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| + | ===About Electrical Bulbs=== | ||
| + | : An '''electrical bulb''' usually refers to a [[Filament Bulb]]. However, there are other types. | ||
| + | : In a [[Filament Bulb|filament]] '''bulb''' [[Electrical Work|electrical work]] is done to [[heat]] the filament to a high enough [[temperature]] that it glows in [[Visible Light|visible light]], see [[Black Body Radiation|black body radiation]]. | ||
| + | : The [[Electrical Current|electrical current]] has a [[heating]] effect on the filament which increases its [[temperature]]. This causes the [[Electrical Resistance|resistance]] to increase, so the '''bulb''' does not behave as an [[Ohmic Conductor|ohmic conductor]]. | ||
Revision as of 11:20, 27 February 2019
Contents
Key Stage 1
Meaning
This bulb has a filament inside it that glows when electricity goes through it.
A light bulb is something that lights up when you switch it on.
Key Stage 2
Meaning
An electrical bulb is a circuit component that gives out light when electricity goes through it.
About Electrical Bulbs
- There are many different kinds of electrical bulb.
- The type of electrical bulb you will use in class is called a Filament Bulb. It has a thin piece of wire inside that glows when electricity passes through it.
- Electrical bulbs can get very hot so you shouldn't touch the glass.
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 |
| An electrical bulb. | The symbol for an electrical bulb. |
Key Stage 3
Meaning
An electrical bulb is a circuit component that gives out light when electricity goes through it.
About Electrical Bulbs
- There are many different kinds of electrical bulb.
- The type of electrical bulb used in class is called a Filament Bulb. It has a thin piece of wire called a filament that becomes so hot when electricity passes through it that it begins to glow.
- Electrical bulbs can get very hot so you shouldn't touch the glass.
|
|
| An electrical bulb. | The symbol for an electrical bulb. |
Key Stage 4
Meaning
An electrical bulb is a circuit component that gives out light when electricity goes through it.
About Electrical Bulbs
- An electrical bulb usually refers to a Filament Bulb. However, there are other types.
- In a filament bulb electrical work is done to heat the filament to a high enough temperature that it glows in visible light, see black body radiation.
- The electrical current has a heating effect on the filament which increases its temperature. This causes the resistance to increase, so the bulb does not behave as an ohmic conductor.