Abstract: RLC series resonance experiment is one of the basic experimental contents of circuit experiments. During the experiment, the error between the actual measured value of resistance voltage during resonance and the theoretical value was discovered, the reasons for the error were explored, and research on the frequency characteristics of inductance AC resistance was conducted. Experimental methods and instrument measurement methods were compared, and theoretical calculations and modeling simulations were conducted from the perspective of electromagnetic fields. The process of discovering, raising, analyzing, and solving problems is the process of exploratory experimental teaching. In this process, it enhances the learning interest of college students, cultivates innovation and research abilities, and is a beneficial attempt to transform university validation experiments into exploratory comprehensive experiments.