Example image of eyePlorer eyePlorer map for 'Electrical conduction': Electric charge Electrical conductor Transmission medium Electric current Electric field Fick's law of diffusion Metal Ohm's law Resistor Electrical conductivity Resistivity Semiconductor device Elementary charge Anisotropy Electron hole Tensor Atom Electrolyte Ion Chlorine Sodium Redox Proton conductor Gas Dielectric Insulator (electrical) Avalanche breakdown Electrical breakdown Ionization Plasma (physics) Electric arc Lightning Spark Molecule Temperature Field electron emission Free electron model Free space Thermionic emission Quantum tunnelling Work function Atomic orbital Cathode Incandescent light bulb Vacuum tube Cold cathode Vacuum arc Krytron American wire gauge Cut-off (electronics)