P2 5.1: Alternating current.

All information was taken directly from the AQA revision guide with only the key points from P2 5.1.

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  • Created by: JSpencer
  • Created on: 07-03-16 15:29
What do cells and batteries supply?
A current that passes round the circuit.
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What is the current called from cells/batteries? Why?
A direct current or dc as it goes in one direction.
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What is the current called from the mains? Why?
Alternating current or ac, as it goes in one direction then reverse then another.
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What is the frequency of UK mains supply?
50 Hertz.
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What does 50 hertz mean?
That it changes direction 50 times each second.
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What is the voltage of main?
230V
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What does the live wire of the mains do?
Alternate between positive and negative depending on the neutral wire.
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What voltage is the neutral wire?
0 volts.
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What are the peak voltages that the live wire alternates between?
+325V and -325V
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What is this equivalent too?
Direct potential difference of 230V
10 of 10

Other cards in this set

Card 2

Front

What is the current called from cells/batteries? Why?

Back

A direct current or dc as it goes in one direction.

Card 3

Front

What is the current called from the mains? Why?

Back

Preview of the front of card 3

Card 4

Front

What is the frequency of UK mains supply?

Back

Preview of the front of card 4

Card 5

Front

What does 50 hertz mean?

Back

Preview of the front of card 5
View more cards

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