- #1
eng_stud
- 14
- 0
I was under the impression that a source transformation doesn't change a circuit at all, which I guess is an oversimplification.
If you have a series RC circuit, with a DC voltage source, after the transients have died out, all voltage will be across the capacitor, and none across the resistor, as there is no current flowing anymore (when cap is fully "charged"), right?
If you now do a source transformation, changing the DC voltage source to a DC current source, with the resistor in parallel, you now have a parallel RC circuit with a DC current source. Now, surely, current will never cease as it has another path through the resistor. So after the capacitor is charged, all current goes through the resistor. So in this case there's voltage across both the resistor and capacitor?
This might all be incredibly obvious. I just want to make sure there is nothing here that I have misunderstood!:)
If you have a series RC circuit, with a DC voltage source, after the transients have died out, all voltage will be across the capacitor, and none across the resistor, as there is no current flowing anymore (when cap is fully "charged"), right?
If you now do a source transformation, changing the DC voltage source to a DC current source, with the resistor in parallel, you now have a parallel RC circuit with a DC current source. Now, surely, current will never cease as it has another path through the resistor. So after the capacitor is charged, all current goes through the resistor. So in this case there's voltage across both the resistor and capacitor?
This might all be incredibly obvious. I just want to make sure there is nothing here that I have misunderstood!:)