When the electrons move, it is called current. Resistance is the restriction to current's flow. More voltage pressure will result in more current flow for a given resistance restriction. Flowing current causes magnetic fields. Magnetic force is proportional to the current flow, ignoring non-ideal effects.
Magnetic force causes valve spool and electric motor movement.
Just as forcing fluid through a restriction generates heat, forcing current through resistance also generates heat. The heat is measured in wattage . Inductance is the property of a coil resisting changes in current flow. Capacitance is the property of a capacitor resisting changes in voltage. Feel free to fast forward past the next section, but remember where to find it when you need it.