Exam-style question
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Using the transformer turns ratio, explain how a step-up transformer increases voltage.
Model answer
What a good answer should say
- In a step-up transformer, the turns ratio (Ns/Np) is greater than 1, meaning there are more turns in the secondary coil than in the primary coil.
- According to the transformer equation Vs/Vp = Ns/Np, this results in a higher secondary voltage (Vs) compared to the primary voltage (Vp).
Explanation
Why this works
This answer effectively describes the relationship between the turns ratio and voltage transformation in a step-up transformer, demonstrating an understanding of how transformers function. The question assesses the student's ability to apply the transformer equation to explain practical outcomes.
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