Mains electricity

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9 Terms

1
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What does a cell or battery provide?

A direct current

2
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Where does the direct current flow to?

In 1 direction only

3
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What’s direct current produced by?

A direct potential difference

4
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What do the mains electricity provide?

An alternating current

5
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Where does the alternating current flow to?

It repeatedly reverses direction.

6
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What’s alternating current produced by?

An alternating potential difference

7
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What do the positive and negative terminals of an alternating power supply do?

It swaps over with a regular frequency.

8
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What’s the frequency of the mains electricity supply in the UK?

50 Hz

9
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What’s the voltage of the mains electricity supply in the UK?

230 V