Electricity

• What is an electric current?

  A flow of negative electrons
• A charged battery is connected to a closed circuit, electrons flow from the negative terminal to the positive terminal
• What is electricity?


  Electricity is a form of energy and is the flow of electrical power or charge
• What is static electricity?


  An imbalance of charge on objects
• What is static discharge?

  A sudden transfer of electrostatic charge
• How is static electricity created?

  When 2 objects are rubbed against each other and one material transfers it’s electrons to the other, creating an imbalance of positive and negative charge
• What is current electricty?

  The flow of electricity in a steady manner over a period of time
• What are insulators? Give examples


  Insulators don’t conduct electricity/doesn’t allow electricity to flow through it. Examples are wood and rubber.
• What are conductors? Give examples


  Conductors allow electricity to flow through the material. Examples are wire and metal
• What do electrical currents ALWAYS have?

  A power source for energy

  A load that uses the energy

  Connecting wires that carries the moving electrons
• Components of an electrical current

  
• Information about currents

  Symbol: I

  Measurement: Amps/Milliamps

  Purpose: Flow of electrons
• Information about Voltage/Potential difference

  Symbol: V

  Measurement: Volts

  Purpose: Gives electrons energy
• Information about resistance

  Symbol: R

  Measurement: Ohms

  Purpose: Resists the flow of electrons
• Ohm‘s Law

  
• What are the differences between a series and parallel circuit?

  Series: Lights are all different brightness, when a bulb is removed everything stops, current in a series is the same at all points, voltage is split amongst all components (sum = battery voltage), continuous flow of charge

  Parallel: All lights are the same brightness, when bulb is removed everything continues, current is split amongst all components, voltage is the same everywhere, multiple branches of wire