energy transfer by appliances

• What is meant by the power rating of an appliance?

  The rate at which energy is transferred
• What are the two main categories of energy transfer in appliances?

  • Kinetic energy
  • Thermal energy
• What types of energy do a blender and a fan primarily transfer?

  Kinetic energy from electrical energy
• What is the main purpose of a blender?

  To mix food
• What is the main purpose of a fan?

  To create air currents
• What type of energy do an iron and a kettle primarily transfer?

  Thermal energy from electrical energy
• What is the power rating of the fan?

  20 watts
• What is the power rating of the blender?

  400 watts
• What is the power rating of the kettle?

  Up to 2,200 watts
• What is the power rating of the iron?

  Up to 2,400 watts
• Why do appliances designed to generate thermal energy have higher power ratings?

  They require more energy to heat up
• What is the power of one watt in terms of energy transfer?

  One joule per second
• How can you use the power rating of an appliance?

  To calculate total energy transfer
• What are the energy transfers for a hair dryer and a washing machine?

  • Hair dryer:
  • Kinetic energy (motor moves air)
  • Thermal energy (heating element heats air)
  • Washing machine:
  • Kinetic energy (motor turns drum)
  • Thermal energy (heating element heats water)
• What type of appliances are not designed to generate thermal or kinetic energy?

  Television
• What is the focus of the exam questions mentioned in the video?

  Energy transfers in appliances
• What is the intended energy transfer for the blender and fan?

  Kinetic energy from electrical energy
• What is the intended energy transfer for the kettle and iron?

  Thermal energy from electrical energy
• How do the energy transfers differ between appliances designed for kinetic energy and those for thermal energy?

  Kinetic appliances focus on movement, thermal on heat