Work Done

• What supplies energy to most modern technology?

  Electric currents
• What do light bulbs, electric heaters, and loudspeakers do with electric current?

  They transfer energy from electric currents to another form
• What form of energy does a light bulb transfer electric current to?

  Light waves
• How does an electric heater utilize electric current?

  It stores it as thermal energy
• What type of energy does a loudspeaker transfer electric current to?

  Sound waves
• Why is it important to recognize energy transfers in electrical components for the exam?

  Because you need to be familiar with these devices
• What is one way to generate an electric current?

  By converting other forms of energy
• What type of energy does a battery store to generate an electric current?

  Chemical energy
• How can motion generate an electric current?

  By using magnets
• What is an example of a device that can generate current through motion?


  Hamster wheels
• How do generators produce electric currents?


  By transferring energy from fossil fuels to kinetic energy
• What do power supplies do to generate electric currents?

  They convert other forms of energy
• What do power supplies do to charge carriers?

  They do work on charge carriers to give them energy
• What are the charge carriers typically found in circuits?

  Delocalized electrons
• What happens to charge carriers when a battery does work on them?

  They start moving around the circuit
• What is the relationship between charge carriers and electric current?

  The motion of charge carriers constitutes the electric current
• What is required for a circuit to function properly?

  A closed loop
• What does the battery do during the cycle of a circuit?

  It does work on the charge to give it energy
• What happens when charge carriers give energy to components in a circuit?

  They transfer energy to other forms like light and heat
• What does "work on a charge" mean?

  Energy is given to charge carriers
• What does "work by a charge" mean?


  Charge carriers give energy away
• What are the methods of generating electric currents?


  • Converting chemical energy (e.g., batteries)
  • Using motion with magnets (e.g., hamster wheels, bike wheels)
  • Generating kinetic energy from fossil fuels (e.g., generators)
• What is the process of energy transfer in a circuit?

  1. Power supply does work on charge carriers
  2. Charge carriers gain kinetic energy
  3. Charge carriers move around the circuit
  4. Energy is transferred to components (light, heat, sound)
  5. Work is done by charge carriers
• What is the role of the AI tutor mentioned in the study material?

  • Supports students in their revision
  • Provides interactive quizzes and videos
  • Aims to motivate students for better exam results