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Introductory Physics Homework Help
How does high internal resistance make high voltage power supplies safe?
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[QUOTE="Aimhigh, post: 5455519, member: 542018"] [h2]Homework Statement [/h2] When the internal resistance is large in comparison to the external resistance, the terminal potential difference falls to a small value. This is used to make high voltage supplies safe for use in a laboratory. Explain how this makes the supply safe. [h2]Homework Equations[/h2] V[SUB]terminal[/SUB] = EMF - V[SUB]internal[/SUB] [h2]The Attempt at a Solution[/h2] If the internal resistance is high, since V[SUB]internal[/SUB] = I r, where r is the internal resistance, the V[SUB]internal[/SUB] will be high. This means the V[SUB]terminal[/SUB] will be low. And because of the internal resistance, the current will also be low. So then what is the point of having a high voltage power supply? [/QUOTE]
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Introductory Physics Homework Help
How does high internal resistance make high voltage power supplies safe?
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