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Forums
Engineering
Electrical Engineering
Voltage source and current source
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[QUOTE="Drakkith, post: 6560550, member: 272035"] I said that Ohm's law applies [I]when [/I]using current sources, not [I]to [/I]the current source. At least not ideal ones. The OP asked about the dependence of current on the resistance of the load. What I was trying to show was that the voltage drop across the load resistor changes as the current or resistance changes. So given a steady current source, the voltage across the load changes as the load resistance changes. The ratio of the two is always the same so that i=v/r at all times. Similarly, if you change i then v will change such that r=v/i at all times. Edit: In case I'm not clear enough, what I mean is that if you have a circuit you can take any component and measure V, I, and R and you'll find that they match up in accordance with Ohm's law. At least in the simple circuits we've been discussing here. Ohm's law might hold if you get into circuits with varying properties and more complex components than we've been discussing, but I wouldn't know since that is out of my realm of knowledge. Is that not what I did in my examples? [/QUOTE]
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Forums
Engineering
Electrical Engineering
Voltage source and current source
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