Publication at Faculty of Mathematics and Physics |
2012
Abstract
The article explains experimentally the concept of the effective (RMS) value of alternating current and voltage. It describes an experiment with two small light bulbs, a controllable power supply, generator, voltmeter and oscilloscope which allows us to explore the RMS value of voltage of various waveforms and compare it to theory.
The article also shows how the RMS value relates to the phase angle regulation. Last but not least the article discusses the way how simple digital multimeters used in a school labs measure and diplay the RMS value of alternating current and voltage.