Transcript High voltagex

High voltage
Watch the ‘Electric Graffiti’ video
What hazards did you see in the film?
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?
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.
•
•
•
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•
Power station
Step-up transformer
Pylons
Step-down transformer
Consumer
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
M
Plenary
Wires on a pylon are often made of
aluminium. Why is copper not used
when it is a better conductor of
electricity?