A | B |

Closed Circuit | On |

Open Circuit | Off |

Electric Charge | fundamental property of matter; comes in two forms |

Voltage | amount of energy per unit of charge |

Water tower and pump | good analogy for a battery |

safety device that reacts to specific levels of current | fuse |

safety device that reacts to specific levels of current | circuit breaker |

safety measure that reacts to certain levels of current | ground fault circuit interrupter |

How are Direct Current and Alternating Current different? | direction of charge flow |

Current | flowing charges |

Conductors | electrical current passes easily through |

Where do almost all of the electrons flowing in a battery circuit come from? | atoms in the wire conductor |

Good conductors of electricity | metals |

Electrical Resistance | ability of an object to resist current |

Unit of measurement for resistance | Ohm |

Ohm's Law | mathematical relationship between current, voltage and resistance |

Resistors | Components on a circuit board used to control current |

If 2 amperes of current pass through a light bulb with a resistance of .5 ohms, what is the voltage of the battery? | One Volt |

Neutral objects | equal amount of positive and negative charge |

AC current | electrical system in US; current reverses 60 times per second |

Tungsten | filament used in light bulbs because of its high resistance |

Voltage | measure of potential energy of an electric charge |

Current | flow of electric charges in a circuit |

Insulator | material through which charges do not flow |

Conductivity | property of material that allows charge to flow |

Battery | device that uses chemical reactions to separate positive and negative charges |