Principles of Transformer Operation
Physics: AQA GCSE Higher, topic 7.3.4
Principles of Transformer Operation
Transformers work like this:
Alternating potential difference (p.d)
- An alternating p.d (p.d that is constantly changing direction) is applied to the primary coil of the transformer.
- This alternating p.d causes an alternating current to flow through the primary coil.
Changing magnetic field
- The alternating current creates a continuously changing magnetic field in the iron core of the transformer.
- The changing magnetic field in the iron core also passes through the secondary coil.
Secondary coil potential difference (p.d)
- The changing magnetic field passing through the secondary coil induces an alternating p.d in the secondary coil.
Test yourself on Principles of Transformer Operation
In which part of a transformer is a changing magnetic field induced?