Use of Transformers (AQA GCSE Physics Combined Science): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the main role of transformers in the National Grid?
What is the main role of transformers in the National Grid?
Increase and decrease potential difference
What are the two coils in a transformer called?
What are the two coils in a transformer called?
Primary and secondary coils
What are the coils in a transformer wrapped around?
What are the coils in a transformer wrapped around?
An iron core
What does a step-up transformer do to potential difference?
What does a step-up transformer do to potential difference?
Increases it
In a step-up transformer, how do the coil turns compare?
In a step-up transformer, how do the coil turns compare?
Secondary has more turns than primary
Why are step-up transformers used in the National Grid?
Why are step-up transformers used in the National Grid?
For electricity transportation via cables
In a step-down transformer, how do the coil turns compare?
In a step-down transformer, how do the coil turns compare?
Secondary has fewer turns than primary
When are step-down transformers used in the National Grid?
When are step-down transformers used in the National Grid?
Before electricity reaches homes
What is the efficiency of transformers?
What is the efficiency of transformers?
Nearly 100%
Which equation shows power conservation in transformers?
Which equation shows power conservation in transformers?
If V, A, V, what is ?
If V, A, V, what is ?
1 A
If V, A, A, what is ?
If V, A, A, what is ?
400 V