Series circuits

• Ammeters

  • Have a very low resistance
  • Current through them can be measured accurately
  • Always connected in series with the components
• Voltmeter

  • Have a very high resistance
  • No current flows through them
  • Always connected in parallel with the components
• Current in a series circuit is the same at any point in a single closed loop A1 = A2 = A3
• The total resistance of two resistors in series is the sum of the individual resistors Rtotal = R1 + R2
• The potential difference across components in series is shared between components and must add up to the cell voltage Vcell = V1 + V2
• The higher the resistance of a component in series

  The larger the share of the potential difference it has