Understanding Input and Output Currents in Transformers and Their Practical Applications

The video tutorial explains how transformers work, focusing on the relationship between the number of turns in the primary and secondary coils and their effect on input and output currents. It covers the definition of electrical power, the efficiency of transformers, and the equations that relate power, current, and potential difference. The tutorial also distinguishes between step up and step down transformers and their applications in the National Grid, highlighting how they help reduce power loss during electricity transmission.

Describe the role of transformers in the National Grid.

Why is it important to increase the potential difference when transferring electricity over long distances?

What is the formula for power loss in the wires of the National Grid?