Calculating Power

• What is the definition of power?

  Power is the rate at which energy is transferred or the rate at which work is done.
• What are the equations for calculating power?

  • Power (in watts) = Energy transferred (in joules) / Time (in seconds)
  • Power (in watts) = Work done (in joules) / Time (in seconds)
• What is the unit for power?

  The unit for power is the Watt, symbolized as capital W.
• How is one Watt defined?

  One Watt is one Joule per second.
• How do you calculate power when given energy and time?

  Divide the energy transferred by the time taken.
• How do you calculate power when given work done and time?

  Divide the work done by the time taken.
• What is the process to calculate the power of a heating element?

  1. Determine the total energy transferred (in joules).
  2. Measure the time taken (in seconds).
  3. Use the formula: Power = Energy transferred / Time.