resistance

• What does electricity involve in an electric circuit?

  A transfer of energy
• What type of energy does a cell contain?

  Chemical energy
• What is carried by the current in a circuit?

  Electrical energy
• What is the current in a circuit?

  A flow of electrons
• What happens to electrical energy when electrons pass through a component?

  It is transferred to other forms of energy
• What does potential difference help us work out?

  The energy transfers involved
• What is the potential difference of the cell mentioned?

  9 volts
• How much electrical energy does the current carry per coulomb of charge?

  9 joules
• What does the potential difference across the lamp indicate?

  All electrical energy is transferred
• What causes energy transfer in components?

  Resistance
• What does resistance tell us?

  The potential difference required to drive current
• What is the unit for resistance?

  Ohm
• What is the equation for calculating resistance?

  Resistance = potential difference / current
• How do you rearrange the resistance equation to find potential difference?

  Potential difference = current * resistance
• What is the process of energy transfer in a circuit?

  • Current flows through components
  • Electrons collide with atoms
  • Electrical energy converts to other forms (e.g., thermal, light)
• How can you calculate resistance in a circuit?

  1. Use the formula: Resistance = potential difference / current
  2. Units: Ohms
  3. Remember to rearrange for potential difference if needed