A | B |

Electrical Charge | This is why bits of paper stick to a plastic comb that has been rubbed |

Touch an electroscope with a negatively-charged rod | Charging by conduction |

Charging by induction | no charges are separated |

Electric field | force per unit charge |

force on a test charge in an electric field | directly proportional to the magnitude of the field |

As an electric field becomes stronger, the field lines shoulb be drawn | closer together |

The work done moving a test charge from one point to another | electric potential difference |

The equation for the potential difference between two points in a uniform electric field | V=Ed |

Touching an object to earth to eleiminate excess charge | grounding |

Where charges are found on a hollow conductor | on the outer surface |

capacitor | a device that stores a charge, made up of two conductors separated by an insulator |

The rate at which energy is transferred | power |

The resistance of a conductor can be determined if these are known | potential difference and current |

The current flowing in an electric circuit can be increased by | increasing voltage or decreasing resistance |

a device that measures the amount of current in a circuit | ammeter |

measure of energy used by utility companies | kWh |

The resistance required by an ammeter | low |

the resistance required by a voltmeter | high |

the way a voltmeter is connected in circuits | parallel |

the way an ammeter is connected in circuits | series |

equivalent resistance in a series circuit | R1+R2+R3 |

equivalent resistance in a parallel circuit | 1/R=1/R1+1/R2+1/R3 |