energy transfers by appliances

• Domestic appliances


  Devices found in homes that transfer electrical energy into other forms of energy
• Domestic appliances


  • Can transfer electrical energy into kinetic energy or thermal energy, or both
• Examples of domestic appliances

  • Blender
  • Fan
  • Iron
  • Kettle
  • Hairdryer
  • Washing machine
• How blender and fan transfer energy

  Electrical energy transferred into kinetic energy of electric motors
• How iron and kettle transfer energy

  Electrical energy transferred into thermal energy
• How hairdryer and washing machine transfer energy

  Electrical energy transferred into both kinetic energy and thermal energy
• Power rating


  The rate at which an appliance transfers energy, measured in watts (joules per second)
• Power ratings of appliances

  • Fan: 20 watts
  • Blender: 400 watts
  • Kettle: up to 2200 watts
  • Iron: up to 2400 watts
• Appliances designed to generate thermal energy usually have a much higher power rating than those designed to generate kinetic energy