1. High voltage

2. Watch the ‘Electric Graffiti’ video What hazards did you see in the film?

3. What is a transformer (with diagram)? Explain what happens in a step-up transformer with reference to voltage and current Why would the electricity company want to transmit electricity at high voltage? What are the safety implications of high voltage?

4. Draw a diagram to show how the National Grid carries electricity from the power station to your home. Include the following and mention the voltage at each stage. Power station Step-up transformer Pylons Step-down transformer Consumer

5. How will electricity be used in circuits in the home? Using these common symbols, draw simple circuits showing how electricity would be used in: A lamp A motor

6. Plenary

7. Wires on a pylon are often made of aluminium. Why is copper not used when it is a better conductor of electricity?