"Tony Hwang" wrote in message
news:C%Hnb.210864$pl3.59615@pd7tw3no...


j j wrote:

"Tony Hwang" wrote in message
news:C4bnb.197307$pl3.160437@pd7tw3no...


Hi,
Since you used word PURELY, even the filament of incandescent bulb has
inductance, how could it be pure R without X? I still stick my gun on
my statement. Watts is not equal to VA, better give some margin.
Tony


at 60 Hz, the inductance of a filament is irrelevant. We're not in the
microwave range...

Hi,
Knit picking. I am RF guy.

then you know that engineering is based on approximations.
at RF frequencies the inductance can't be ignored, but for a power engineer,
at 60 hertz, the load is purely resistive.
the difference between 6 ohms and 6.0003 is irrelevant in this context.