Semi-log sample graph
Lable your graph like the picture below (voltages on the y-axis, frequency
on the x-axix). Notice that the frequency scale is log base 10 (it increases
by 1's then by 10's then by 100's etc.). Plot all three voltages on the
same graph. The resonance frequency is the frequency where a) Vr
is a maximum and the VL and Vc lines cross each other.
Physics at IUS: http://physics.ius.edu/
Contact Dr. K. Forinash,
for comments/suggestions/corrections.