Physics GCSE
Turns ratio and power equations
What Turns ratio and power equations means in Physics GCSE, as defined for AQA.
Definition of Turns ratio and power equations
Check what you remember
Read the wording for your board, then hide it and explain Turns ratio and power equations in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The turns rule states Vₚ ÷ Vₛ = nₚ ÷ nₛ, and the power rule assumes 100% efficiency, meaning power in equals power out (Vₚ × Iₚ = Vₛ × Iₛ).
Topics that use Turns ratio and power equations
- Transformers (HT only) (AQA GCSE)
Related terms
- iron core
- magnetic linking
- National Grid transmission
- Changing magnetic field
- Easily magnetised
- primary coil
- secondary coil
Using Turns ratio and power equations 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
All Physics GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge