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 flow of electrons around the circuit called?

  Current
• What happens to electrical energy when electrons pass through a lamp?

  It is transferred to other forms of energy
• What is used to work out energy transfers in a circuit?

  Potential difference
• What causes energy transfer in components?

  Resistance
• What does resistance tell us in a circuit?

  The potential difference required to drive a current
• What happens to electrons as they move through a conductor?

  They collide with atoms
• What is the unit for resistance?

  Ohm
• What is the equation for calculating resistance?

  Resistance = potential difference / current
• What is the resistance of lamp A with a current of 1 ampere and a potential difference of 1 volt?

  1 ohm
• How do you calculate the potential difference needed for a certain current?

  Multiply current by resistance