The real reason for AC is to torture electrical engineering students.
I thought it was to torture live sound guys with 60 hertz hum.
Edison had an elephant electrocuted to try to get his picked.
http://www.youtube.com/watch?v=Gr6xBz-h99U&oref=http%3A%2F%2Fwww.youtube.com%2Fresults%3Fsearch_query%3Delephant%2Belectrocuted%26oq%3Delephant%2Belectrocuted%26aq%3Df%26aqi%3D%26aql%3D%26gs_sm%3De%26gs_upl%3D5751l10835l0l12163l8l8l0l0l0l0l2538l2538l9-1l1l0
Ironically, Edison promoted his DC current (versus Tesla's AC) by doing a road show where he executed elephants.
It was really a plot to make it difficult for students to gain admittance to grad school, preying on their susceptance to fads, while impeding their progress, taxing their capacitance to learn, and overcoming their resistance to doing so.
"imagine" that?
Only a EE geek would find that funny...
I'm in awe of double Es. My understanding of AC ends at right about this neighborhood:
BTTT