The national grid is the network of cables and transformers used to transfer electricity from power stations to consumers.
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What is a step-up transformer?
A step-up transformer is a transformer used to step the voltage up (e.g. from power station to voltage grid)
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What is a step-down transformer?
A transformer used to step the voltage down (e.g. from national grid to mains voltage in offices and housing)
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Why do we use step-up transformers?
We use step up transformers because transmission at high voltage reduces the energy wasted in cables, making the system more efficient.
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Why do we use step-down transformers?
We use step-down transfomers because it would be dangerous to supply electricity to consumers at very high voltages
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How are the cables supported?
The cables, carried long distances across the countryside, are supported by overhead pylons or could be buried underground when close to homes and towns.
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Other cards in this set
Card 2
Front
What is a step-up transformer?
Back
A step-up transformer is a transformer used to step the voltage up (e.g. from power station to voltage grid)
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