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25 Cards in this Set
- Front
- Back
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Conductors |
Materials that let electrons pass through them |
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Insulators |
Are materials that conduct hardly at all. Insulators are easy to charge. |
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Good conductor |
Metals - the electrons are free making them good thermal conductors |
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Good Insulator |
Plastics
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Bad conductors |
Water |
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Bad insulator |
Glass |
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Semi conductor |
Poor conductors when cold better conductors when warm |
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Electricity |
A flow of elctrons |
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earthing |
Where objects are connected to the ground by a conducting material so that unwanted charge flows away |
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Charge (C) |
Current x time |
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How can you charge objects |
Friction because electrons are transferred leaving one with less and one with more electrons |
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Dangers of static electricity |
Refuelling aircrafts you can get sparks which lead to explosion |
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Uses of static electricity |
Inkjet printers photocopiers |
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If resistance goes up in a circuit |
Current goes down |
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Volt meters always have to be connected in.. |
Parallel |
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Ammeters are always connected in.. |
series |
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Resistance= |
Voltage \ current |
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Conventional current |
+ to - |
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Electrons |
- to + |
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Voltage= |
Current x resistance |
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Diode symbol |
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Charge = |
Current x time Q = I x t |
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The more components in a circuit |
The lower the current the electrons have to fight their way through all of it |
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Ldr |
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Thermistor |
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