Direct and alternating potential difference (4.2.3.1) — AQA GCSE Physics Revision Notes
Revision notes for AQA GCSE Physics specification point 4.2.3.1, Direct and alternating potential difference.
Direct and Alternating Current:
- DIRECT CURRENT (DC) is electrical current flowing in ONE direction.
- Direct current is usually found in BATTERY POWERED devices.
- ALTERNATING CURRENT (AC) is current that changes direction from positive to negative periodically.
- An example of AC is the UK MAINS SUPPLY (Current from sockets in the home).
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