Physics · IGCSE · Cambridge · Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · Specification point · 4.5.6 · Electricity and magnetism · Electromagnetic effects
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4.5.6 The transformer
| Core | Supplement |
|---|---|
1 Describe the construction of a simple transformer with a soft-iron core, as used for voltage transformations 2 Use the terms primary, secondary, step-up and step-down 3 Recall and use the equation |
where p and s refer to primary and secondary
4 Describe the use of transformers in high-voltage transmission of electricity
5 State the advantages of high-voltage transmission
6 Explain the principle of operation of a simple iron-cored transformer 7 Recall and use the equation for 100% efficiency in a transformer where p and s refer to primary and secondary 8 Recall and use the equation to explain why power losses in cables are smaller when the voltage is greater |