Iam a newbie to this field. what is a return path? Are return paths always through physical electrical connections ? or return paths are possible also through field couplings? In other words, can arm C be a return path, in the figure shown below? Source is driving across A and B (current is returning via B , electrically to the source). Load is connected at the end of line A(point RL1) and to line B(point RL2). lines B and C are connected. |--------------C | RL1 | -----------A | |-------------B RL2 regards, Jayaprakash. __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu