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I'm a little confused as to Current and Voltage, and I was wondering if someone could tell me if my understanding is correct and/or point me to a good tutorial on current/voltage and basic electronic circuit principles. As well as some good tutorials on circuit analysis.

So this is how I understand it + my questions about it.

1) Electrons travel in a conventional circuit travel from positive to negative (although in reality they travel from negative to positive).

Q)

*I'm confused as to how this may affect the current/voltage output at different areas.*

2) Charge is a particle (electron) that moves around a circuit. The potential amount of energy is called the voltage. And the current is the quantity of charge passing through a point.

Q)

*I'm confused about the relationship between current and voltage. How can an electron have a potential amount of energy? What exactly does the battery do? Does it like 'kick' the electrons to give them more power? If so, what would be an analogue for charge? I mean, what affects it... is it the width of the wire? I can't really see how a battery can increase the quantity of charge passing through a point. Also, can charge be lost? Or does it just get split up? And what happens to current when it goes to a battery... is it constant unlike voltage?*

3) Another question/analogue that's been plaguing me. In a lightbulb, when the tungsten filament resist's the electrons, is it resisting the voltage, or the current?

Sorry about the large amounts of questions :(

Thanks!