Use of Transformers (OCR GCSE Physics A, Combined (Gateway Science Suite)): Quizzes
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11 questions from this quiz
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Practise the questions
11 questions from this quiz
What is the main purpose of transformers in the National Grid?
What is the main purpose of transformers in the National Grid?
To increase and decrease p.d.
How many coils does a transformer have?
How many coils does a transformer have?
Two coils
What material forms the core around which both transformer coils are wrapped?
What material forms the core around which both transformer coils are wrapped?
Iron
In a step-up transformer, how does the secondary coil compare to the primary coil?
In a step-up transformer, how does the secondary coil compare to the primary coil?
More turns
What is the main use of a step-up transformer?
What is the main use of a step-up transformer?
Electricity transportation via cables
In a step-down transformer, how does the secondary coil compare to the primary coil?
In a step-down transformer, how does the secondary coil compare to the primary coil?
Fewer turns
Where are step-down transformers used?
Where are step-down transformers used?
Before electricity reaches homes
What is the efficiency of transformers?
What is the efficiency of transformers?
Nearly 100% efficient
Which equation represents the power conservation in a transformer?
Which equation represents the power conservation in a transformer?
If , , , what is ?
If , , , what is ?
2.5 A
What happens to current when voltage increases in a transformer?
What happens to current when voltage increases in a transformer?
Current decreases