Transformers (AQA GCSE Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does a transformer change in an AC supply?
What does a transformer change in an AC supply?
Potential difference
What does a step-up transformer do?
What does a step-up transformer do?
Increases potential difference
What does a step-down transformer do?
What does a step-down transformer do?
Decreases potential difference
How many coils of wire does a basic transformer have?
How many coils of wire does a basic transformer have?
Two
What are the coils in a transformer wrapped around?
What are the coils in a transformer wrapped around?
An iron core
Why do transformers not work with direct current?
Why do transformers not work with direct current?
DC produces a constant magnetic field
What does the current in the primary coil produce?
What does the current in the primary coil produce?
A magnetic field
What does the changing magnetic field induce in the secondary coil?
What does the changing magnetic field induce in the secondary coil?
A potential difference
Why are transformers used before transmission across the National Grid?
Why are transformers used before transmission across the National Grid?
To increase voltage
Why are transformers used for electricity in homes?
Why are transformers used for electricity in homes?
To lower high voltage to safe levels
What type of transformer has more coils on the secondary coil?
What type of transformer has more coils on the secondary coil?
Step-up transformer