A Study on RLC Circuits in High School Physics

Abstract

In High School Physics textbook published by TOKYO SHOSEKI, an exploratory project using RLC circuits is presented. The explanation says that “The miniature bulb L1 does not light up and bulb L2 and L3 light up at resonance frequency”. However, such an outcome cannot usually be realized by students in the classroom. That situation can be realized only when L/C takes a specific value. In order to find the proper conditions for successful realization, I have developed an application software that draws a vector diagram of the RLC circuit and used it to find the correct parameters. In this paper, I demonstrate appropriate parameters for the project to be successfully realized. In addition, I propose a method using an ampere meter instead of miniature bulbs.