Types of Transformer
Physics: Cambridge International GCSE Supplement, topic 4.16.3
Step-Up and Step-Down Transformers
Transformers are separated into step-up transformers and step-down transformers.
Step-up transformer
- Ns > Np .
- The secondary coil has more turns than primary coil.
- The potential difference across the secondary coil is greater than the potential difference across the primary coil. (The potential difference is ‘stepped up’.)
Step-down transformer
- Ns < Np .
- The secondary coil has fewer turns than primary coil.
- The potential difference across the secondary coil is less than the potential difference across the primary coil. (The potential difference is ‘stepped down’.)
Test yourself on Types of Transformer
In a step-up transformer, the number of turns on the secondary coil is...