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19 Cards in this Set
- Front
- Back
What do we need electricity for everyday? |
- Motion - Heating/Cooling - Light - Communication |
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What is Static Electricity? |
An imbalance of electric charge on the surface of an object. |
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The Law of Electric Charge states that... |
- like charges repel - opposite charges attract |
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Charging Objects Friction |
Rubbing 2 n° objects together. |
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Charging Objects Conduction |
Charging an object with an already charged object. |
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Charging Objects Induction |
Charging a n° object by bringing another charged object close to it, but not touching. |
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Current Electricity: Conductors |
A material that transmits energy easily. |
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Current Electricity: Insulators |
Materials that resist or block the flow of electrons |
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Current Electricity: DC |
Direct Current. Flow of electrons is in one direction only. |
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Current Electricity: AC |
Alternating Current. Current that repeatedly reverses direction. |
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Series Circuits |
Electricity has only one path to follow. (Ex: flashlight, toys, drill) |
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Series Circuit: Measuring Electric Current |
( I ) The rate of flow of e- past a certain point in a circuit. Measured in Amperes ( A ) Ammeter must be connected in series with a load in a circuit. |
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Parallel Circuits |
The electricity has more than one path to follow. (Homes are parellel because devices can be switched on/off individually. |
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Parallel Circuits: Voltmeter |
Measures the voltage drop between 2 points of an electric circuit. Voltage drop is measured by connecting a voltmeter in parallel between 2 points in a circuit. |
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ELECTRICAL SAFETY- Wall Outlets |
1. Made of plastic. Plastic does not conduct electricity. 2. Most new outlets have a third hole called the ground terminal. This allowed electricity to leave the building and go into the ground. 3. New wall outlets have polarized plugs. So the appliance will only fit in the outlet one way. |
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GFCI |
Ground Fault Circuit Interrupter Includes circuit breaker that responds to very small changes in current and interrupts (stops) the flow of electricity. |
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Electrical Power |
The rate at which electrical energy is produced or used. Unit of Measurement is the Watt. (W) |
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Kilowatt-hour |
(kW-h) Measures electrical energy usage. Formula: (kW-h) (h) (¢/kW-h) |
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Ohm's Law |
As potential difference across a load increases, so does the current. Formula: V=I×R |