Use of Transformers (OCR GCSE Physics A (Gateway Science Suite)): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are transformers used for in the National Grid?
What are transformers used for in the National Grid?
Increasing and decreasing 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 material are the coils of a transformer wrapped around?
What material are the coils of a transformer wrapped around?
An iron core
What does a step-up transformer do?
What does a step-up transformer do?
Increases potential difference
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
What are step-up transformers used for?
What are step-up transformers used for?
Electricity transportation via cables
What does a step-down transformer do?
What does a step-down transformer do?
Decreases potential difference
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
What are step-down transformers used for?
What are step-down transformers used for?
Reducing voltage before reaching homes
What is the efficiency of transformers?
What is the efficiency of transformers?
Nearly 100% efficient
Given V, A, V, calculate using .
Given V, A, V, calculate using .
2.5 A
Why does the equation apply to transformers?
Why does the equation apply to transformers?
Transformers are nearly 100% efficient