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GCSE Physics · key term
The rate at which energy is transferred, measured in watts.
Used by AQA, Edexcel and OCR
Specification 4.2.4.3, 4.7.3.4 · Paper 1, Paper 2
Energy transferred per unit time, measured in watts (W).
Revise: The National GridElectrical power is transferred through this network rather than being produced separately beside every consumer.
Specification 13.8, 13.10 · Paper 2
The rate at which energy is transferred, measured in watts (W).
Specification P8.2c · Paper 2 (Foundation), Paper 4 (Higher)
The rate at which energy is transferred, measured in watts (W).
Revise: National GridThe National Grid is the network that transfers electrical power around the country. Electrical power tells us how quickly energy is transferred.
Do not say that transformers increase electrical power. A step-up transformer increases potential difference and decreases current; some energy is still lost during transmission.
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