Cambridge IGCSE Physics
4.5.6The transformer
The transformer in Cambridge IGCSE Physics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic13 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 4.5.6.1Describe the construction of a simple transformer with a soft-iron core.
- 4.5.6.2Use the terms primary, secondary, step-up and step-down.
- 4.5.6.3Use Vp/Vs = Np/Ns.
- 4.5.6.4Describe the use of transformers for high-voltage transmission of electricity.
- 4.5.6.5State the advantages of high-voltage transmission.
- 4.5.6.6Supplement: explain how a simple iron-cored transformer works.
- 4.5.6.7Supplement: use IpVp = IsVs for a 100% efficient transformer.
- 4.5.6.8Supplement: use P = I²R to explain why cable losses are smaller at higher voltage.
Lessons
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Transformers and the transmission of electricity
35 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Turn The transformer into a strength.
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