National Grid P1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the national grid? | The network of pylons and cables covering Britain, taking electricity from power stations and other sources and distributing it to homes and businesses
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| What are the jobs of transformers? | To increase or decrease the voltage to the level suitable for either transporting across the wires or providing it at a safe suitable level
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| What does a step up transformer do? | Increases the voltage coming from a power station to 400,000 volts so it can be quickly and cheaply carried around the network of wires
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| What does a step down transformer do? | Decrease the voltage to safe usable levels so that consumers (towns. villages etc.) can use it for power
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| Pros of overhead cables?(4) | • Cheaper
• Easily accessible
• Easily set up
• Minimal disturbance to land
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| Cons of overhead cables(4) | • Lots needed
• Ugly
• Affected by weather
• Less relaiable
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| Pros and cons of underground cables? | Its the opposite to overhead cables
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| How can supply be increased? | More power stations or more output
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| How can demand be decreased? | Consumers using more energy efficient appliances
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
GuyBrazier
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