2009/7/8 Ruben J=F6nsson : >> 2009/7/7 Ruben J=F6nsson : >> > When is U NOT equal R*I? >> >> If you define U=3DR*I, then, as you are saying, they are always equal. > > That is just my point. Ohms law always apply, as (if I remember correctly= now) > was the original question. Although, I completely agree with you that it = is not > practical to use it in all circumstances. > This one is not bad. http://en.wikipedia.org/wiki/Ohm%27s_law -- = Xiaofan http://mcuee.blogspot.com -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist