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9.1 DC Voltage Sources Lab objectives The objective of this hands-on is to determine experimentally the internal impedance of a voltage source and to plot its external characteristic graph.Background Information An ideal DC voltage source is such an electric energy source that the potential difference between its output terminals is independent on the external circuit current. The potential difference in a real DC source depends, to a certain degree, on the external circuit current. In real life this dependence is usually linearornearly linear: 0V Ir D = D× , (1) where
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