On Mon, Apr 13, 2009 at 05:40:57PM +0200, Henning Brauer wrote: > 1A * 120V = 120VA ~= 120W Assuming cos(O) is somewhere near unity, which isn't a good assumption to make even though it's increasingly close in new switching power supplies. In the case of autoranging supplies it's usually pretty good.
Small switching supplies like ones for sokeris etc. can be pretty bad. Linear supplies will also be far from 1. -- Jussi Peltola
