**Electrical Properties (Condensed Matter)** ============================================ .. py:currentmodule:: symplyphysics.condensed_matter.electrical_properties **Contents:** .. toctree:: :maxdepth: 4 condensed_matter.electrical_properties.current_density_from_mobility condensed_matter.electrical_properties.current_density_via_number_density_and_drift_velocity condensed_matter.electrical_properties.drift_velocity_of_charge_carriers condensed_matter.electrical_properties.resistance_from_temperature condensed_matter.electrical_properties.speed_of_charged_particles_in_gas_via_mobility