National grid

What is the function of power stations in the National Grid?

Generate electricity

What is the role of substations in the National Grid?

Distribute electricity

Order the sequence of how electricity is transmitted through the National Grid.

1⃣ Generation at power stations

2⃣ Step-up voltage by transformers

3⃣ Transmission through high-voltage lines

4⃣ Step-down voltage at substations

5⃣ Distribution to homes and businesses

Why is high-voltage used in transmission lines?

To minimize energy loss

Outline the phases of electricity transmission through the National Grid:

1⃣ Generation

2⃣ Transmission

3⃣ Transformation

4⃣ Distribution

Match the voltage level with its benefit in the National Grid:

High Voltage ↔ Reduces power loss during transmission

Low Voltage ↔ Safe for home and business use

What is the purpose of a transformer?

Changes AC voltage levels

What are the two types of coils in a transformer?

Primary and secondary

What principle does a transformer use to change AC voltage levels?

Electromagnetic induction

What creates the magnetic field in a transformer?

Alternating current