I have read this chapter about calculating internal and external inductance of a straight wire here. http://nptel.ac.in/courses/Webcourse-contents/IIT-KANPUR/power-system/chapter_1/1_4.html Seeing the flux linked with the conductor itself, emf due to that flux induced in upper half and lower half of the wire are in opposite direction. How does this internal inductance work? How is back emf generated by the flux linked with the conductor itself? Thanks in advance!