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Ammeters and Voltemeters

  • most electrical failures are because of TOO MUCH CURRENT PASSING THROUGH THE APPLIANCE.
  • ammeters- measures current THROUGH a bulb
  • always connected in SERIES with the bulb- this is so the current through them is the same.
  • the unit of current is in amps.
  • Voltmeters- measures the potential difference (ie VOLTAGE) ACROSS a bulb
  • POTENTIAL DIFFERENCE (PD) (ie voltage)- the work done (energy


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