Mains electricity (AQA GCSE Physics): Quizzes

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Mains electricity
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What voltage does mains electricity arrive at in UK homes?

230V AC

What color is the live wire in a mains cable?

Brown

What color is the earth wire in a mains cable?

Yellow and green stripes

What voltage does the live wire carry?

230V230\text{V}

What voltage is the neutral wire at?

0V0\text{V}

What is the main job of the earth wire?

Safety protection

Which wire is dangerous because it has high voltage?

Live wire

Does the earth wire carry current during normal operation?

No

What is the potential difference between earth and neutral wires?

0V0\text{V}

What is the potential difference between live and neutral wires?

230V230\text{V}

What do fuses do when current gets too high?

Melt and break the circuit

Why is the live wire still dangerous when an appliance is switched off?

It remains at 230V230\text{V}

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