On Sat, 11 Nov 2006 05:46:06 -0000, "BIGEYE"
wrote:

I am to draw an impedance diagram of a low pass filter comprising resistor &
capacitor, and to indicate the phase angle. I am in dispute with teacher on
the phase angle.
Is the phase angle found by:
1) -arctan(wRC)
or
2) -arctan(Xc/R)
Appreciate if someone could advise which one of the above is correct.

TIA


#1 gets the nod. Which did you pick?
http://www.phys.unsw.edu.au/~jw/RCfilters.html