Series and parallel circuits

• Series circuits : One component broken = all components stop working

  
• Potential difference = total p.d of supply is shared between components

  V(total) = V1 + V2
• Current = where’ve ammeter is placed in a series circuit the reading is the same

  I1 = I2 = I3
• Resistance = series circuit , resistance add up to make total resistance

  R(total) = R1 + R2
• Parallel circuits - one component broken = no affect others, more useful

  
• Parallel circuits

  Potential difference - same for all components

  V1 = V2
• Parallel circuits

  current - total current = total of all current through tall components

  I(total) = I1 + I2 + I3
• Parallel circuits

  resistance - adding resistance reduces total resistance