Transformers (Edexcel GCSE Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What are the two coils in a transformer called?
What are the two coils in a transformer called?
Primary and secondary coils
What material is used as the core in a transformer?
What material is used as the core in a transformer?
Iron
What is the main purpose of transformers in the National Grid?
What is the main purpose of transformers in the National Grid?
Increase/decrease 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
Where are step-up transformers used in the National Grid?
Where 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
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%
What equation relates power in primary and secondary coils?
What equation relates power in primary and secondary coils?
A transformer has V, A, V. Find .
A transformer has V, A, V. Find .
10 A
Which type of transformer increases potential difference?
Which type of transformer increases potential difference?
Step-up transformer
If V, A, V, calculate .
If V, A, V, calculate .
2 A