« Back to subjects

Preliminary Physics

Sign up now   $99.00 / year

2 | Electrical energy in the home

4: The amount of power is related to the rate at which energy is transformed

Lesson 1 | Power, current and voltage

  • Explain that power is the rate at which energy is transformed from one form to another.

  • Identify the relationship between power, potential difference and current.

  • Perform a first-hand investigation and use available evidence to demonstrate the relationship between current, voltage and power for a model 6V to 12V electric heating coil.

Lesson 2 | Energy and power

  • Identify that the total amount of energy used depends on the length of time the current is flowing and can be calculated using:

    Energy = VIt

  • Solve problems and analyse information using:

    P = VI


    and

    E = VIt

  • Explain why the kilowatt-hour is used to measure electrical energy consumption rather than the joule.

« Back to subjects
  • HSCStudy Lab Lessons

    53 Lessons

    Lessons by expert teachers that cover the NSW Preliminary Physics Syllabus comprehensively.

  • HSCStudy Lab Quizzes

    53 Practice questions

    53 lesson quizzes that include a variety of questions. This course also includes 20 focus level and 4 module level tests, as well as a comprehensive end of course practice exam.

  • HSCStudy Lab videos

    49 Hours of video

    Videos that fully explain complex physics questions through animation, practical experiments, and tutorials.

  • HSCStudy Lab interactives

    21 Interactive activities

    Interactive activities that help you explore and understand key syllabus dot points as well as additional resources such as an interactive oscilloscope.

Sign up for HSC Study Lab today!

Sign up now
HSC Students