4.5.6 The transformer
- Syllabus
- 0625–2026–2027
- Topic
- 4.5.6
- Level
- —
4.5.6.1—Construction of a simple transformer
- Describe the construction of a simple transformer with a soft-iron core, as used for voltage transformations
4.5.6.2—Terms primary, secondary, step-up and
- Use the terms primary, secondary, step-up and step-down
4.5.6.3—Transformer relation: Vp/Vs = Np/Ns
- Recall/use transformer relation: Vp/Vs = Np/Ns, where p and s mean primary and secondary
4.5.6.4—Use of transformers in high- voltage
- Describe the use of transformers in high- voltage transmission of electricity
4.5.6.5—Advantages of high-voltage
- State the advantages of high-voltage transmission
4.5.6.6—Principle of operation of a simple
- Explain the principle of operation of a simple iron-cored transformer
4.5.6.7—100% transformer efficiency: IpVp =
- Recall/use 100% transformer efficiency: IpVp = IsVs, where p and s mean primary and secondary
4.5.6.8—Recall/use: P = I2R to explain why
- Recall/use: P = I2R to explain why power losses in cables are smaller when the voltage is greater
Objective notes
8 learning objectivesConceptIGCSE Physics