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GCSE Physics · key term
The amount of energy moved from one store to another, measured in joules (J).
Used by AQA and Edexcel
Specification 4.1.1.4 · Paper 1
Energy moved from one store to another or carried from one place to another, measured in joules (J).
Revise: PowerThis is different from the total energy transferred. Two machines can transfer the same amount of energy but have different powers because one completes the transfer in less time. Conversely, a low-power device can eventually transfer more energy than a high-power device if it operates for much longer.
Specification 10.6, 10.27, 10.29 · Paper 2
The amount of energy transferred by an electrical process, measured in joules (J).
Energy moved from one store to another or transferred between systems; it is measured in joules (J).
Choose the numerator from the wording: use energy transferred, , or work done, . Both are measured in joules.
Do not assume that a more powerful device must transfer more energy overall. Power compares energy transferred per second, so the operating time matters.
Do not confuse power with energy: power is measured in watts, whereas energy transferred is measured in joules.
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