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# Ch 33 Physics EA

### Chapter 33

Term | Definition |
---|---|

electric field | a force field that fills the space around every electric charge or group of charges. |

field lines | vectors that describe the electrified web of space that will draw and repel other charges which it enters. |

electrical potential energy | energy a charge has due to its location in an electric field; |

electric potential | electric potential energy per coulomb at a location in an electric field; measured by volts and often called voltage |

volt | si unit of electric potential one volt is the electrical potential difference across which one coulomb of charge gains or loses one joule of energy |

voltage | electric potential; measure in volts. and potential difference. |

potential difference | the difference in electric potential between two points. free charges flow. |

electric current | the flow of electric charge, measured in amperes. |

voltage source | a device, such as a battery or generator, that provides a potential difference |

electric resistance | the resistance of a material to the flow electric current through without resistance |

direct current | electric current whose flow of charge is in one direction |

alternating current | electric current that repeatedly reverses direction, twice each cycle, 60 cycles per second. |

a force field that surrounds an electric charge or group of charges | electric field |

an electric field has both magnitude and | direction |

the concept of electrical potential energy per charge that has a special same | electric potential |

the SI unit of measurement for electrical potential | volt |

the name for electric potential measured in volts | voltage |

the energy a charge has due to its location is an electric filed | electrical potential energy |

this happens when there is a difference between the conductors which prevents charge flow | Potential Difference |

the flow of electric charge | electric current |

work | is done when a force moves something in the direction of the force |

there is no way to shield___ because it only attracts | gravity |

how can you shield an electric field? | surround the object with a conducting surface |

a volt is equal to | is equal to one joule/coulomb |

weaker test charge means | smaller field |

an electric field has both | magnitude and direction |

gravitational field | a force field that surrounds a mass |

acting at a distance | the contact between objects in an electric and gravitational field |

positive test charge | the direction of an electric field at any point is the direction of this |

vector quantity | has magnitude and direction, represented by vectors |

vectors | lines with arrows to show strength and direction of the field lines |