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Summary the basic components of a simple circuit are a source of voltage or potential difference v like a battery power supply solar cell etc a device with a resistance r like a light heater motor television etc identified by the generic name resistor wires of negligible resistance to carry current i on a closed loop from the voltage source to the resistor and back. Science physics library circuits ohms law and circuits with resistors ohms law and circuits with resistors introduction to circuits and ohms law basic electrical quantities current voltage power this is the currently selected item circuits with capacitors. A resistor capacitor circuit known as an rc circuit is a type of electrical circuit that has both a resistor and a capacitor this quiz and worksheet combination will help you better understand. In a nutshell resistors dissipate energy and capacitors store energy to understand the nature of circuits which include capacitors one ideally should have an understanding of current as a function of time in a circuit and how the flow of current leads to the build up of charge