Intro into circuits

• What are the main components of an electrical circuit?

  A power source and a conductor for electrons to flow through
• How is an electrical circuit represented?


  With circuit diagrams using specific symbols
• What is the symbol for a cell in a circuit diagram?


  A simple version of a battery
• How is the symbol for a battery represented in circuit diagrams?


  As two cell symbols put together
• What is the symbol for a filament lamp?


  A small light bulb
• What happens when a switch in a circuit is closed?


  Current continues flowing around the circuit
• What is potential difference in an electrical circuit?


  The force driving the flow of electrons
• What is the unit of measurement for current?


  Amperes (amps)
• What does the letter 'i' represent in an electrical circuit?


  Current
• What is the unit of measurement for potential difference?


  Volts
• What does the letter 'v' represent in an electrical circuit?


  Potential difference
• What is the unit of measurement for resistance?


  Ohms
• What does the letter 'r' represent in an electrical circuit?


  Resistance
• How do electrons flow in a circuit?


  From the negative terminal to the positive terminal
• What does the longer line in a cell or battery represent?

  The positive terminal
• What does the shorter line in a cell or battery represent?


  The negative terminal
• What is conventional current?


  The flow of current from positive to negative terminal
• Why do we still use the convention of current flowing from positive to negative?


  It was established before the discovery of electron flow
• What are the key terms related to electrical circuits?

  • Potential difference (voltage)
  • Current
  • Resistance
• What are the main components and symbols used in circuit diagrams?

  • Cell: simple battery symbol
  • Battery: two cell symbols
  • Filament lamp: small light bulb symbol
  • Switch: open and closed positions