BRAINCAKESuperconductivity
Reducing the temperature of material reduces the resistance because the atoms move less and there are fewer collisions between the electrons and the vibrating atoms in the lattice.
Below a certain critical temperature the resistance drops to zero. This is called superconductivity.
The critical temperature varies for different materials but for metals the critical temperature is below -243°C.
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More in Electrical Quantities
- Current-Voltage Graphs
- Resistivity
- Conduction and Drift Velocity
- Resistance and Temperature
- Semiconductors
- Current-Voltage Graph for Diodes
- Current-Voltage Graph for Thermistors and LDRs
- Insulators
All 18 lessons in Electrical Quantities · All Edexcel AS-level Physics topics