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DescriptionFourIVcurves.svg
English: I–V curves (current–voltage characteristics) for four devices: A resistor with large resistance, a resistor with small resistance, a diode, and a battery. An ideal battery would have a constant voltage (a vertical line in the I–V curve), but this one has an internal resistance that causes the I–V curve to tilt slightly away from vertical. All four plots use the passive sign convention.
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