Transformers _ GCSE Physics

The video tutorial explains the function and types of transformers, focusing on step-up and step-down transformers used in the national grid. It describes their structure, working principle through electromagnetic induction, and the importance of AC current. The tutorial provides formulas for calculating potential differences and highlights the efficiency of transformers. It also introduces switch mode transformers used in electronic chargers, noting their high-frequency operation and low power consumption when idle.

What are the two main types of transformers used in the national grid?

Explain how a step-up transformer works.

What is the formula used to calculate the potential difference across the coils of a transformer?

How does the current in the primary coil relate to the current in the secondary coil in a transformer?

Describe the operation of a switch mode transformer.