{HEAD ~ A} will be more positive than the voltage at {TAIL ~ terminal} B. Like also, a voltage is induced in the secondary Ls of transformer T such that terminal 22 is now at a positive potential relative to the potential at terminal 20 
{ HEAD ~ A } will be more positive than the voltage at { TAIL ~ terminal } B. Like also , a voltage is induced in the secondary Ls of transformer T such that terminal 22 is now at a positive potential relative to the potential at terminal 20
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH