Edexcel IGCSE Physics 6.18P Step-up & step-down transformers
Practise explaining how step-up and step-down transformers reduce transmission losses between power stations, cables and local users.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- place step-up and step-down transformers correctly on a transmission diagram
- explain why high voltage gives lower current and less heating in transmission cables
- link step-down transformers to the lower voltage needed near homes or schools
6.18P Step-up and step-down transformers question 1
[Maximum number: 5]
Transformers are useful in the transmission of electricity.
Explain how transformers are useful in the large-scale transmission of electricity.
You may draw a diagram to support your answer.
Any five from:
- step-up transformer used before transmission
- voltage is increased before transmission
- current is reduced before transmission
- less heating in transmission cables
- less energy wasted in transmission cables
- step-down transformer used after transmission
- voltage is decreased after transmission for safety
Accept:
- any mark if clear from a diagram
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