Basics:DC Circuits
From Filipino Engineer Wiki
Electric Circuit
An electric circuit is a closed path consisting of active and passive elements all interconnected and the current flow is confined to the closed path. Fig. l shows a typical circuit consisting of one active and two passive elements. An active element is one which supplies energy to the circuit where as a passive element is one which receives energy and then this energy is converted into heat (resistor) or stores it in an electric (capacitor) or magnetic field (inductor). The battery is the active element in Fig. l.
