Electricity is a difficult substance to appreciate with the human senses. About the only way you get a feeling for it is to moisten the tongue and apply it between the terminals of a 9 volt battery. Here are some electrical quantities and their SI units and symbols. Electric fields form lines which are trajectories along which a very small free charge would travel in the absence of a magnetic field in the same place. The flow of charge constitutes a current.
Currents often travel along electric field line directions and generate magnetic fields.
In regions of constant charge density, all currents flow in closed loops. If the current loop does not close then there must be accumulation of charge which varies with time. All magnetic fields B form closed loops. Electric field lines either begin or end on charges or else they too form closed loops. In a radiating situation, the currents, charges, fields, and potentials are all time varying.