Combined Science GCSE
Live wire
What Live wire means in Combined Science GCSE, as defined for AQA.
Definitions of Live wire
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Reference: AQA
Carries the alternating potential difference from the supply, so its potential difference changes direction and magnitude with time.
A wire at a high alternating potential difference relative to earth, so touching it can drive current through a person to earth.
Carries the alternating potential of the mains supply, so contact with it can drive a current through a person to earth.
Carries the alternating potential difference from the supply at about 230 V and is dangerous if touched.
The wire whose insulation is brown in a three-core cable.
Topics that use Live wire
- Mains electricity (AQA GCSE)
Related terms
- colour code
- double insulation
- Earth wire
- Electrical safety
- Function and placement of switches
- fuse
- Fuses and circuit breakers
- Insulation
Using Live wire in the exam
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