BRAINCAKEElectric Current
Current is the rate of flow of charge.
| I = | ΔQ Δt |
Usually the particles moving in an electrical circuit are the free conduction electrons in the metal wiring and in the electrical components (metals or semiconductors). In an electrolyte the particles are ions.
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Key terms in this lesson
- ammeter
- An instrument used to measure electric current, connected in series in a circuit, ideally with zero resistance.
More in Electrical Quantities
- Electric Charge
- Charge Carriers
- Electromotive Force e.m.f.
- Potential Difference
- The Electron Volt
- Resistance
- Ohm's Law
- Example Question
All 18 lessons in Electrical Quantities · All Edexcel AS-level Physics topics