So, yes, it would run a vacuum cleaner?

--
Christopher A. Young
Learn more about Jesus
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"harry" wrote in message
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Look at the whole issue this way. Let's suppose you have an electric
circuit inside a box with two terminals.
You can measure the resistance of that circuit. For any given
frequency of a current you pass through it, you can measure the
impedance (XL or Xc).
And that's it. There's absolutely nothing else you can tell.
The same applies with a motor, transformer or whatever. If there are
more terminals, you can only determine resistance and impedance
between them.. Nothing whatever about the circuit inside the box.

It's down to Kirchhoffs laws. Read all about it.
http://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws

The bit about summation of currents at a node =0 is the bit you want.