Power

• What is the purpose of electrical appliances?

  To bring about energy transfers
• What does the amount of energy transferred by an appliance depend on?

  How long the appliance is switched on
• What factors influence the power of an appliance?

  The power of the appliance and its usage time
• How can power in electrical systems be calculated?

  By measuring energy transfer per second
• What two measurements are used to calculate power in an appliance?

  Voltage and current of the appliance
• How are 'energy transfer' and 'work' related in physics?

  They are the same concept in physics
• When is work done in an electrical circuit?

  When charge flows through a circuit