## Thévénin Equivalent Circuit
The Thévénin voltage is the open circuit voltage at the output. calculation is straightforward node or loop circuit analysis. Using loop analysis: V _{oc}: [8 * I1] + [(8+2+6) * I2] - [6 * I3] = 1 AI2 = ½A ==> Voc = ½A * 6 Ω= 3 V = V _{th}Calculate the Thévénin resistance from the open circuit voltage and the short circuit current (set R _{L}
= 0 and solve for I3) using Ohm's Law.R _{th} = V_{oc} / I_{sc} = 3 V / [(4/9) A] = 27 / 4 Ω = R_{th}
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