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    Physics A-Level

    Internal Resistance

    What Internal Resistance means in Physics A-Level, as defined for Pearson Edexcel.

    Definition of Internal Resistance

    The resistance inherent in the source itself (e.g., the battery), which causes energy to be dissipated as heat within the source.
    Pearson Edexcel · Mechanics (study guide)

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    Using Internal Resistance in the exam

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