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# Electric Circuits

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

Define direct current (DC). | Current flowing in ONE direction. |

What are the 3 components of an electric current? | Battery, conductor, Load/resistance |

What does a voltmeter do? | Measures the POTENTIAL DIFFERENCE between any two points in a circuit. |

What does an ammeter do? | Measures amps and is connected in series in the circuit. |

What is the formula for OHM's Law? | V = I x R |

Define series circuit. | Electric circuit whose component parts are arranged end-to-end so that the current passes consecutively through each part. |

What is the formula for a volt circuit series? | V(t) = V(1) + V(2) + V(3) |

What is the formula for an amp circuit series? | I(t) = I(1)/R = I(2)/R = I(3)/R |

What is the formula for a ohm circuit series? | R(t) = R(1) + R(2) + R(3) |

Define parallel circuit. | Component parts are connected as branches of main circuit so that current is divided among them. |

Define power. | The electric energy expended per second. |

What is the formula for power? | P = I*V |

What is the UNIT for power? | Watt |

What is the formula for the amp parallel circuit? | I = i1/R + i2/R + i3/R |

What is the formula for the voltage parallel circuit? | V = v1 = v2 = v3 |

What is the formula for the resistance parallel circuit? | R = r1 + r2 + r3 |

What circuit device must be connected in parallel? | Voltmeter |

What are the required indicators on the x-ray exposure switch? | Audible, Visible |

Where in the basic x-ray circuit is the timer located? | Between the exposure switch and step-up transformer |