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# Series Circuits

### Bio Med Tech course 1

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

What is a series circuit? | It is the simplest circuit. Current (I) flows in a single path through all the components in the circuit. |

What are components? | They are electrical devices used to control the operation of a circuit. |

Hows the current flow in a series circuit? | Current flows from the negative terminal of the voltage source to the postitive terminal of the voltage source. |

How do you calculate current? | By dividing the applied voltage by the total resistance. |

How is resistance (R) calculated in a series circuit? | Add the resistors together. |

Does current change in any point in a series circuit? | No current is the same at every point in a series circuit. |

What is a voltage drop? | A voltage drop is the voltage that develops across the resistor when current flows through a resistor. |

What is the applied voltage in a series circuit? | It is the sum of all the voltage drops in a series circuit |

How to find the voltage drop of an individual resistor? | Multiply the current (I) by the resistor being measured. |

How to check if your voltage drops equal the voltage source? | You add the voltage drop of the resistors together and the sum equals the voltage source |

How do you calculate the applied voltage? | The applied voltage is equal to the sum of the voltage drops. VA=Vr1+Vr2+Vr3 or use Ohms law VA=IXRt |

Resistance and ----- in a series circuit are proportional to one another? | Reistance and Voltage |

What is the procedure for finding a problem in any electronics? | The procedure should be Logicl and Systematical |

What are the steps for troubleshooting any circuit? | 1. Analyze the circuit. 2. Check the setup. 3. Calculate and measure values. 4. Check the results. |

How is Voltage measurements made? | Without breaking the circuit. |

How are current or resistance measurements made? | The circuit must be broken to make these measurements. |

What are the three faults common in a series circuit? | 1. Open, 2. Short, 3. Changed Value |

When does a "OPEN" occur? | When a component provides no path for current flow. An open component causes the entire applied voltage to drop across the open component. |

What happens when a resistor starts to open? | The resistance increases. When the resistor opens completely, resistance increases to maximum resistance or infinity (∞) |

What happens when a resistor opens completely? | Resistance is so high that current flow stops. |

How do you determine if a circuit has an open component? | Make voltage measurements, measure the voltage drop of each resistor in the circuit. If you have a resistor that has a voltage drop equal to the applied voltage, you have identified the open resistor. |

What is a Short? | A short occurs when a resistor provides no resistance to current flow in a series circuit. |

What happens to voltage drop across a shorted component? | There is NO voltage drop. |

What happens when a component shorts completely? | There is no resistance to current flow. This is the same as replacing the resistor with a piece of wire. |

What happens to current flow through a shorted component? | The current flow is maximum through the component. |

How to find a shorted component in a circuit? | Make voltage measurements. Measure the voltage drop of each component in the circuit. |

What happens if you measure a component that has no voltage drop? | You have identified the shorted component. |

When does a "CHANGED VALUE" occur? | A changed value occurs when a component's value increases or decreases. |

In a seris circuit, with a component that has changed value what happens to the voltage drop? | The voltage drop across that component is larger or smaller than the calculated value. |

Does a changing component value affect current flow in a series circuit? | Yes The change in value causes the measured values to be different than your calculated values. |

The voltage dropped across an open component in a series circuit is? | Equal to the applied voltage |

The voltage dropped across a shorted component in a series circuit is? | Zero |