BRAINCAKECharge Carriers
Insulators
No electrons move through insulators because there are no free electrons that can move through the solid lattice.
The electrons are attached to the atoms. These electrons are in the valence energy band.
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Key terms in this lesson
- Potential difference
- The energy transferred per unit charge as charge moves between two points in a circuit.
- Resistance
- The ratio of the potential difference across a component to the current flowing through it, measured in ohms.
More in Electric Current
- Electrical Conduction
- Electric Current and Electric Charge
- The Emf of a Source
- Potential Difference
- Energy Transfer
- Electric Power
- Resistance
- Measuring Resistance
All 20 lessons in Electric Current · All AQA AS-level Physics topics