Supplying Electricity

• Electricity can be supplied in two ways, with an…

  • Alternating Current (AC)
  • Direct Current (DC)
• AC = current that flows backwards and forwards.
• DC = currents that flows in the same direction all the time.
• AC

  • Voltage constantly changes size and the current constantly changes direction.
• AC is supplied by the National Grid.
• DC

  • Voltage and current have a constant size and direction.
• • DC is supplied by batteries.