Electricity yr 11

    Cards (13)

    • Current from power station is AC
    • Household circuit is 230 V
      • Live wire -brown
      • Earth wire -green and yellow
      • Neutral wire -Blue
    • Fuse always connected to live
      Cable grip to prevent cable from being pulled out
    • Live wire changes passes along an AC current and is the most dangerouse
    • Neutral wire returns the electricity to the generator and is generally kept at 0 V
    • Earth wire- its a safety wire which connect the metal part of the appliance to the earth and stops it becoming live .
    • Some appliances dont have an earth wire as they are double insulated
    • Power is the rate of energy conversion (per second)
      P=IV
      power is measured in W or J/s
    • Fuses are included in a plug as a weak link for safety and incase of a fault and too much current flows, a thin wire will melt to prevent any further damage.
      Always connected with live wire as its the most dangerouse
    • A circuit breaker is an automatic switch which turns off when the current rises above a specific value. It can be reset
    • Electrical Unit: kWh
      E=Pt (J)(W)(s) & (kWh)(kW)(h)
    • Conductors have free electrons which allow a current to flow