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# Ohms law & Power

### Bio Med Tech course 1

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

Ohm's Law states? | Current is directly proportional to voltage and iversely proportional to resistance. |

What is voltage/potential difference? | Voltage is the elctrical pressure or force that makes current flow in a circuit |

What happens if voltage increases? | Current also increases, provided resistance stays the same. |

What is current? | Current is the flow of electrons through an electrical circuit. |

What happens if current flow increases? | Voltage increases and decreases as resistance increases |

What is resistance? | Resistance is the opposition to current flow. |

What happens if resistance increases? | Current decreases, provided voltage stays the same. |

What are the unit of measure for each quantity and also what is the symbol? | Voltage "V or E" (Volt=V), Current "I"(Ampere A) Resistance "R"(Ohm Ω) |

What is the formula for Current in Ohm's Law? | I=V/R |

What is the formula for Resistance in Ohm's Law | R=V/I |

What is the formula for Voltage in Ohm's Law? | V=IxR |

If you have two known electrical quatities what can you do? | You have find the one unknow electrical quanitity |

What can you use to help recall the Ohm's Law? | The VIR circle |

Ohm's Law is what? | The relationship between voltage, current, and resistance |

Voltage can by symbolized by using the letter (E) what does (E) stand for? | Electro-motive force |

What is Power? | Power is how much work an electrical circuit performs |

What is dissipation? | The heat given off that is developed across a resistance |