Transformers (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why do transformers only work with AC and not DC?
Why do transformers only work with AC and not DC?
DC has constant field; no emf induced
If Australian mains supply is 230V RMS, what is the peak voltage? Use
If Australian mains supply is 230V RMS, what is the peak voltage? Use
325V
What is the relationship between voltage, current and turns in a transformer?
What is the relationship between voltage, current and turns in a transformer?
In a step-up transformer, if , what happens to voltage and current?
In a step-up transformer, if , what happens to voltage and current?
and
Which application uses a step-down transformer?
Which application uses a step-down transformer?
Phone charger converting 230V to 5-12V
What is the frequency of Australian mains power supply?
What is the frequency of Australian mains power supply?
50 Hz
A transformer has A, A, . Find using
A transformer has A, A, . Find using
50000 turns
Why is high voltage used for electricity transmission over long distances?
Why is high voltage used for electricity transmission over long distances?
Lower current reduces energy loss via
What is the purpose of a laminated core in transformers?
What is the purpose of a laminated core in transformers?
Reduces eddy currents by restricting paths
For an ideal transformer, what is the power relationship between primary and secondary?
For an ideal transformer, what is the power relationship between primary and secondary?
(power in = power out)