BRAINCAKESuperconductivity
Superconductor materials have zero resistivity below a critical temperature e.g. -123°C for compounds containing mercury, barium, calcium, copper and oxygen.
They are used to make high power electromagnets.
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Key terms in this lesson
- Resistance
- The ratio of the potential difference across a component to the current flowing through it, measured in ohms.
- Resistivity
- A property of a material equal to its resistance multiplied by its cross-sectional area and divided by its length; it does not depend on the dimensions of the sample.
More in Electric Current
- Resistance
- Measuring Resistance
- Ohm's Law
- Resistivity
- Electronic Components
- Investigating the Characteristics of Components
- IV Graphs
- Fixed Resistors
All 20 lessons in Electric Current · All AQA AS-level Physics topics