electricity and circuits

• The flow of electrons through a conductor gives rise to electric current.
• A circuit consists of two or more components connected together by conductors, which allow electrical charge to pass along them.
• In an open circuit there are no pathways for the electric charges to move around so no current flows.
• When a switch is closed it completes the circuit allowing current to flow
• Electrical energy can be transferred from one place to another using wires as a conductor
• When a component is broken it creates an open circuit as there is no longer a complete pathway for the electric charges to travel along.
• An insulator does not let any electric charges pass through it so it will create an open circuit if used in a circuit.
• If a switch is closed then it allows the electric charges to flow from one end of the switch to another creating a complete pathway for the electric charges to follow.
• When we turn on our lights at home, the electrical energy travels down the cable into our house and then into the light bulb where it heats up the filament inside the bulb causing it to glow brightly.
• The fuse protects the appliance if too much current passes through it