Power Losses

["brian_hawes" <b.hawes1@xxxxxxxxxxxxxxxx>]

I have been using FEMM 3.1 to calculate r.f. losses in 
solenoids. I made each turn a separate circuit, and defined 
a current of 1-Ampere. I started by assuming that with I=1, 
I2*R=R, and hence P=R. I found I was getting resistance 
values ~ 1/2 what I expected. It finally dawned that with 
a.c. analyses, the defined current must be treated as an 
r.m.s value. Can someone confirm I am right, or have I 
dropped a factor two somewhere else?