# P2 5.4: Electrical Power and Potential difference.

All information was taken directly from the AQA revision guide with only the key points from P2 5.4.

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• Created by: JSpencer
• Created on: 09-03-16 08:30
What does an electrical appliance do?
Transfer electrical energy into other forms of energy.
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What is power?
The rate at which energy is transferred each second.
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What is the power equation?
P = E divided by t
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What does 'P' stand for? Units?
Power in Watts, W
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What does 'E' stand for? Units?
Energy transferred in Joules, J
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What does 't' stand for? Units?
Time in seconds, s
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What do we measure in an electric circuit?
The current through it and the potential difference.
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What is the Power of appliance equation?
P = I x V
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What does 'P' stand for? Units?
Power in Watts, W
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What does 'I' stand for? Units?
Current in Amperes, A
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What does 'V' stand for? Units?
Potential difference in Volts, V
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What is the potential difference on a mains supply?
230V
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What can the equation be used for?
Calculate the normal current and the size of the fuse to use.
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## Other cards in this set

### Card 2

What is power?

#### Back

The rate at which energy is transferred each second.

### Card 3

#### Front

What is the power equation?

### Card 4

#### Front

What does 'P' stand for? Units?

### Card 5

#### Front

What does 'E' stand for? Units?