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26 Cards in this Set
- Front
- Back
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Static electricity |
A charge produced by rubbing or touching objects together |
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Unbalanced Charges |
A more correct term for static electricity, because the charges are not stationary; rather they move |
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Law of Charges |
Laws that describe the behavior between charged and uncharged objects: 1. Unlike charges attract 2. Like charges repel 3. Charged objects attract uncharged (neutral) objects |
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Insulators |
Any material in which the charge stays on the spot where the object is rubbed - (most non-metals) |
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Conductors |
Materials that allow charges to move freely - (most metals) |
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Superconductor |
Materials that offer little or no resistance to the flow of charges |
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Grounding |
Connecting an object to Earth with conducting wire to safely rebalance the charge |
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Battery |
A combination of cells, wither wet or dry |
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Switch |
Used to open or close a circuit to control the flow of current through it |
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Resistance |
The property of a substance that hinders motion of electric charge and converts electric energy into other forms of energy |
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Loads |
Items along a circuit that convert electricity into other forms of energy |
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Voltage |
A common term for referring to potential difference |
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Amperes |
The unit to measure electric current (A). Milliamperes (MA) is also commonly used |
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Galvanometer |
An instrument used to measure very weak current |
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Anmeter |
An instrument used to measure larger currents |
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Potential difference |
The difference in potential energy per unit of charge between one point in the circuit and another point in the circuit |
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Ohm |
The standard unit for resistance |
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Ohm's law |
R=V/I Resistance=Voltage/Current |
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Series Circuits |
Circuits with only one current path |
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Parallel circuit |
Circuits with several circuit paths and branches |
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Electric circuit |
A path in which electrons from a voltage or current source flow |
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Neutral |
Having equal positive and negative charge |
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Electric current |
a flow of electriccharge |
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Semiconductor |
Materials with higher conductivity than insulators but with lower conductivity than metals. |
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Electrostatic discharge |
the sudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown |
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Resistor |
a device having a designed resistance to the passage of an electric current |
