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Engineering
Electrical Engineering
Some questions on terminology (for native English speakers)
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[QUOTE="jim hardy, post: 5462488, member: 327872"] We English speakers are not consistent, you'll find the terms often used loosely. I like Simon's post. Think of it as a hierarchy Direct means as you said unidirectional. But that does not preclude variations. This would be Direct Current as it's unidirectional [ATTACH=full]187444[/ATTACH] (okay it's voltage, but current through the resistor has same shape) This is approaching "steady" [ATTACH=full]187445[/ATTACH] I'd call it DC with Ripple and put a number on the peak to peak ripple as % of average and at some point where the ripple ibecomes insignificant to the task at hand it'd be okay to call it "steady" and that point is up to the author, or the person explaining it. In most but not all applications 0.1% ripple is negligible . If the graph is an absolutely straight line as from a battery it's steady, unquestionably, and also direct. If it's well enough filtered and regulated it might as well be called steady even though with a big enough microscope you can see variations poorly filtered or unfiltered as first picture it's direct but not steady. Any help ? old jim [/QUOTE]
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Some questions on terminology (for native English speakers)
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