Learn to calculate the total resistance in series and parallel circuits and understand the behavior of current and voltage in these circuits. We explore the nature of electric charge and the fundament...Learn to calculate the total resistance in series and parallel circuits and understand the behavior of current and voltage in these circuits. We explore the nature of electric charge and the fundamental laws governing the interaction of charged particles, as well as the principles of electric circuits, distinguishing between series and parallel circuits and the roles of batteries and power sources.