Voltage & Current

[WelshWonder]

I'm just trying to grasp some basic fundementals here, so please bare with me...

Voltage = Electromagnetic force, so in other words, 'voltage' is the term given to the amount of force applied to a current?

Current = The amount of electrons passing through a point in a circuit?

Electrons = A negatively charged particle associated with an atom?

If my understanding of the above is correct, how do some EMF sources have different current ratings. For example, a car battery gives 12V of force but can provide say upwards of 10A of current and a 12V regular battery will emit mA's of current. So, am I right in assuming that the amount of current a source can provide is dependant of the materials used to create that voltage source?

[brett]

That's right.
Most things have a limit to how much heat they can stand.  When you short-circuit a 9V battery, it fails because it gets hot and breaks or explodes.
PS just about everything heats up when it passes current due to internal resistance  Watts (mostly heat) = volts x amps

[WelshWonder]

Right, I understand...

thanks for clearing that up. I thought I was going crazy!