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Engineering
Electrical Engineering
Voltage source and current source
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[QUOTE="phinds, post: 6560407, member: 310841"] Although what [USER=8921]@berkeman[/USER] says is true, I think it's a bit of an aside from your question since based on your question, it's clear that you need a simple fundamental description of IDEAL voltage and current sources of the kind used in beginner problems before you move on to the real world. SO ... at the most simple level, a voltage source provides voltage without restriction but you're not allowed to short-circuit it because that would imply infinite current (Ohm's Law) and a current source provides current without limit but you're not allowed to have an open circuit across it because that would imply infinite voltage (Ohm's Law). In answer to your question, yes a current source can pump any amount of current into a resistor (this is an ideal situation, not real world). Ideal resistors have no restriction on the amount of voltage across them (but not infinite) or the current through them (but not infinite). Both [USER=8921]@berkeman[/USER] and [USER=644223]@DaveE[/USER] have given good discussions of real-world situations. [/QUOTE]
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Engineering
Electrical Engineering
Voltage source and current source
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