I was experimenting with resonant frequency of a series RLC circuit: 5V AC source 10 ohms resistor 100microF capacitor 46mH inductor Resonant frequency is calculated to be around 74.2Hz. So I set the AC source to resonant frequency 74.2Hz and measured the voltage across the 10 ohms resistor using an oscilloscope. I was expecting to measure close to source voltage of 5V. However I got only 1.34V. That's a phase angle of around 74.4 degrees instead of 0. If my theory is correct, I should get 5V since impedance is minimum with only the resistance 10 ohms as inductance and capacitance "balance out". The connections are straightforward and shouldn't have any mis-connection and the AC source has the right voltage and frequency as seen on the oscilloscope. I'm curious as to what possible errors or factors that I might had missed and hope you guys can enlightenment me if I misunderstood something. Thank you.