Electricity

• The charge in circuits…

  …is always present
• Energy in circuits

  Energy is provided by battery

  Current carries this energy around the circuit
• Series Circuit

  Total p.d shared between all components

  Current is same for all components

  Total resistance=sum of resistances
• Parallel Circuit


  P.d for each branch=P.d of cell/battery

  Current is split between branches

  Adding more resistors in parallel reduces the total resistance