I'm taking a course in circuit analysis and the terms "voltage" and "current" is really holding me back. I know definition of the terms but get easily confused when I try to imagine what actually is happening in a circuit. So lets get this staright, within a voltage source charges are seperated giving you the "+" and "-" terminals--which I would imagine to be a big electric field. What motivates the electrons to flow around the circuit? Is it the "-" terminal of the voltage source that the electrons want to reach when they are released from the "+" terminal? Will the electrons always be released from the "+" terminal of the voltage source? How exactly does a battery lose it's power? My guess is that the energy or electrons is lost through resistance and converted into heat, whilist a few electrons make it back to the battery. Does this mean that the voltage or electric field gets weaker in the battery when it gets drained, up to a point where there is none?