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8 Cards in this Set
- Front
- Back
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What is the equation for specific heat capacity? |
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At what current does the national grid transmit electricity? |
At a low current. |
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What is a transformer? |
A transformer is an electrical device that changes the voltage of an alternating current (AC) supply, such as the mains electrical supply. A transformer changes a high-voltage supply into a low-voltage one, or vice versa. |
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What is are the names for transformers than increase and decrease voltage? |
a transformer that increases the voltage is called a step-up transformer a transformer that decreases the voltage is called a step-down transformer |
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What are step-up and step-down transformers used for? |
Step-up transformers are used at power stations to produce the very high voltages needed to transmit electricity through the National Grid power lines. These high voltages are too dangerous to use in the home, so step-down transformers are used locally to reduce the voltage to safe levels. |
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What is the national grid? |
The National Grid is the high-voltage electric power transmission network in Great Britain, connecting power stations and major substations and ensuring that electricity generated anywhere in England. |
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What is a Sankey diagram? |
A Sankey diagram is a graphic illustration of flows, like energy, material or money flows. Usually the flows are illustrated as arrows. The width of the arrows is proportional to the size of the represented flow. |
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What does a Sankey diagram look like? |
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