Transformers and the Transformer Equation | GCSE Physics
Transformers change the potential difference of an alternating current (AC) using electromagnetism.
Why do transformers only work with alternating current?
What is Transformers and the Transformer Equation | GCSE Physics?
"A device that transfers electrical energy between two or more circuits through electromagnetic induction."
What type of transformer increases the potential difference?
If a step-up transformer has 100 turns in the primary and 400 in the secondary, and Vp = 230V, what is Vs?
Why are step-up transformers used in the National Grid?
Transformer Principles
Step-up transformers increase potential difference; Step-down decrease it.
Primary coil, secondary coil, and an iron core.
Equation: Vp / Vs = Np / Ns (Potential difference ratio = turns ratio).
Step-up transformers are used to reduce energy loss in the National Grid.
Calculation Tip: Ensure you keep the "primary" values on one side and "secondary" on the other when using the transformer equation.
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