The high voltage cables I am talking about are the ones that transfer power from a power station to substations, i.e. the ones mounted on pylons that run across the countryside.
Do these have to form a closed circuit, i.e. is there a flow of electrons back along those lines, or is the electricity "pushed" from one end to the other, as illustrated in the opening section of the DC book?
Do these have to form a closed circuit, i.e. is there a flow of electrons back along those lines, or is the electricity "pushed" from one end to the other, as illustrated in the opening section of the DC book?