Skip to content
    Physics A-Level

    Coefficient of performance

    What Coefficient of performance means in Physics A-Level, as defined for AQA.

    Definition of Coefficient of performance

    Check what you remember

    Read the wording for your board, then hide it and explain Coefficient of performance in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

    Reference: AQA

    A measure of useful energy transfer per unit work input, given by Q_C/W for a refrigerator and Q_H/W for a heat pump.
    AQA · Reversed heat engines (A-level only) (study guide)

    Topics that use Coefficient of performance

    Related terms

    Using Coefficient of performance in the exam

    Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

    Practise Physics questions

    Create a free account to answer exam-style questions on this topic and get feedback on your answers.

    Start free

    A week of Premium from your first lesson · Then the free plan continues · No card, no charge

    All Physics A-Level terms