help me plz! [Inductance] 1. The problem statement, all variables and given/known data an experiment to determine the inductance and internal resitance of an inductor in a series LCR circuit. I am proved with an a.c. power supply, an inductor, a capacitor substitution box, a resistor and an a.c. voltmeter 2. Relevant equations how can i find the resonace frequency, inductance and the internal resistance of the inductor? 3. The attempt at a solution I was suggested to use graphical method to find out the resonance frequency but i don't know how can i do it.