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GCSE Level Questions: Transformers

Q7. The diagram shows shows a traditional transformer.

(a)

(i) The potential difference across the secondary coil is _ _ greater than/ equal to / less than_ _ _ _ _ the potential difference across the primary coil. (Delete incorrect answers).

[1 mark]

(ii) Give a reason for your answer to part (i) and state the name given to theis type of transformer.

[2 marks]

(b) What is the core of the transformer made from?

[1 mark]

(c) What happens as the magnetic field in the core of the transformer changes? Tick one box.

The mass of the core increases.  
A potential difference is induced across the secondary coil.  
The temperature of the core decreases.  

 

[1 mark]

(d) The power supply to the transformer is connected to the mains electricity supply. What is the frequency of the mains electricity supply?

[2 marks]

(e) The power input of the transformer is 2 W. The transformer is 100% efficient.

State the power output of the transformer.

[1 mark]

(8 Marks Total)