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# Circuit Test

Question | Answer |
---|---|

What are Volts? | Units for electric potential, which is analogous to pressure. |

What is current? | The rate at which charge is moving through a circuit. |

What is resistance? | Measured in Ohms, lowers current at given ^V |

What are joules | A unit of charge |

What is a ohmic resistor? | type of resistor where current changes predictably with different ^V's |

Series circuit | Circuit where all of the current must follow the same path. |

Parallel circuit | circuit with two or more paths from high to low potential. |

Coulombs | A unit of charge |

Short Circuit | A circuit where a connection is accidentally made without a resistor in the circuit. |

How to tell if a resistor is Ohmic | When the voltage goes up current goes up. Straight lines equals Ohmic. |

How to find higher resistance | Steeper equals higher resistance |

How would you tell if a resistor is Ohmic | A resistor is Ohmic if it is a straight line on the graph. The resistance doesn't change even when the voltage changes. |

The current through parallel resistors compared to the total current is expected to be : | Half the total |

The current through parallel resistors compared to each other is expected to be: | The same |

The difference between resistors wired in series is expected to be: | voltage/current |

The current through resistors wired in a series compared to the total current through he circuit is expected to be: | The same |

The current through resistors wired in a series compared o each other is expected to be: | The same |

Resistance equation: | R=V/I |

Current equation: | I=V/R |

Voltage equation: | V=IR |