Combined Science GCSE
National Grid efficiency
What National Grid efficiency means in Combined Science GCSE, as defined for AQA.
Definition of National Grid efficiency
Check what you remember
Read the wording for your board, then hide it and explain National Grid efficiency in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A step-up transformer raises potential difference and lowers current for the same power, and this lower current reduces thermal energy dissipation in National Grid cables.
Topics that use National Grid efficiency
- The National Grid (AQA GCSE)
Related terms
- alternating current
- Energy efficiency in the National Grid
- Ideal transformer power balance
- National Grid
- Potential difference and current
- Safe domestic electricity supply
- Step-down transformer
- Step-up transformer
Using National Grid efficiency in the exam
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