AMMETER |
Current in an electric circuit is measured with an instrument called an _____. |

CIRCUIT |
When current is measured, the ammeter is connected so that it becomes part of the _____. |

RESISTANCE |
The opposition to current flow in an electrical circuit is called _____. |

OHM’S LAW: If any two electrical characteristics are known, you can determine the third with Ohm’s Law. |
The law that defines the relationship between current, voltage and resistance is called _____ Law. |

DIRECTLY |
According to Ohm’s Law, the current in any circuit is _____ proportional to the applied voltage. |

A meter used to measure electric current. It is connected as part of a circuit. |
Ammeter |

The unit of measurement of electric current. One ampere is one coulomb per second. |
Ampere |

A complete path allowing current to flow. |
Closed circuit |

A material that gives up free electrons and offers only slight opposition to current flow. |
Conductor |

The movement of free electrons in a material. |
Current |

The force that causes electrons to move through a conductor. |
Electromotive Force (emf) |

Electrons in the outer orbits of an atom that can easily be forced out of their orbits. |
Free Electrons |

A material that does not give up free electrons easily and offers opposition to current flow. |
Insulator |

The basic unit of resistance measure. |
Ohm |

A meter for directly measuring the resistive component of an electrical circuit. |
Ohmmeter |

A circuit with a break or open path that stops current flow. |
Open circuit |

The term most frequently used to express the difference of potential between two charges or between two points of a circuit. |
Voltage |

A meter that is connected across the line to measure the potential difference (voltage) between two points. |
Voltmeter |

The property of a circuit which limits, opposes or resists the flow of electricity through it. |
Resistance |

The resistance of a conductor is measured in a unit called… |
OHM |

E = I x R |
When the current (I) and resistance (R) are known, the voltage (E) can be found by the formula. |

Power |
(P) or (W) means? |

Voltage |
(V) or (E) means? |

Current, Amp or Amperage |
(I) means? |

Ohms or Resistance |
(R) means? |

The instrument used to measure difference in electrical potential is called a _____. |
VOLTMETER |

Materials that have few free electrons are called _____. |
INSULATORS |

# Voltage, Current & Resistance

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