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# Electricity

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

A build up of charge on an insulator is known as? | Static electricity |

Insulators become charged by ............... between the cloth and object | Friction |

Static electricity is found only on these? | Insulators |

These allow current to flow through them? | Conductors |

These prevent damage to buildings if hit by lightning? | Lightning rods |

A lightning rod must be made of ............. as they allow electricity to flow through them | Metal |

When Voltage is proportional to current at a fixed temperature this is known as? | Ohm's law |

A straight line graph shows a .................... relationship? | Proportional |

Unit of current | Amp |

Unit of resistance | Ohm |

Unit of voltage | Volt |

Another word for voltage | Potential difference |

This electrical quantity provides the force to push the electrons around a circuit? | Voltage |

This is a measure of how difficult it is for electrons to flow in a circuit? | Resistance |

A flow of electrons is known as the? | Current |

The symbol for voltage? | V |

The symbol for resistance is? | R |

The symbol for current? | I |

The formula used to calculate voltage? | V = IR |

Current flows from this terminal to this terminal in a battery? | Positive to negative |

The unit of energy consumption used by ESB? | kilowatt hour |

Formula used to calculate the current used? | I = V/R |

A device used to reduce the current flowing in a circuit? | Resistor |

The type of circuit that when one bulb blows they all go out because circuit is broken? | Series |

The type of circuit that when one one bulb blows the other stays lighting because two paths for current to flow in? | Parallel |

Current that flows in one direction only? | Direct current |

Current that is constantly changing direction? | Alternating current |

The number of volts in the mains? | 230 |

The type of current in the mains? | Alternating current |

Electrolysis is an example of the ........... effect of an electric current? | Chemical |

The use of a toaster or kettle uses the .......... effect of an electric current? | Heating |

The electromagnet in a scrap yard uses the .......... effect of an electric current? | Magnetic |

For current to flow the circuit must be? | Complete |

A circuit breaker uses the .............. effect of an electric current? | Magnetic |

A fuse uses the ............ effect of an electric current? | Heating |

This is a safety device that breaks the circuit if its rating is exceeded because the wire inside of it melts? | A fuse |

Created by:
scienceatkcc