Transformers: Electromagnetic Induction at Work (VCE SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the main function of a transformer?
What is the main function of a transformer?
Changes voltage using electromagnetic induction
Why do transformers only work with AC and not DC?
Why do transformers only work with AC and not DC?
AC creates changing flux; DC creates constant flux
Why is soft iron used in transformer cores?
Why is soft iron used in transformer cores?
Easily magnetized & highly flux permeable
A transformer has 100 primary turns and 500 secondary turns. What type is it?
A transformer has 100 primary turns and 500 secondary turns. What type is it?
Step-up transformer
A transformer has 2000 primary turns and 50 secondary turns. What type is it?
A transformer has 2000 primary turns and 50 secondary turns. What type is it?
Step-down transformer
If and V, what is ?
If and V, what is ?
2000 V
In an ideal transformer, what is the relationship between input and output power?
In an ideal transformer, what is the relationship between input and output power?
If a transformer steps up voltage by a factor of 10, what happens to current?
If a transformer steps up voltage by a factor of 10, what happens to current?
Current steps down by factor of 10
What is the typical efficiency of high-quality real transformers?
What is the typical efficiency of high-quality real transformers?
98-99%
How much energy can regenerative braking recapture during normal driving?
How much energy can regenerative braking recapture during normal driving?
15-20%