Basic DC Theory DC CIRCUIT ANALYSISFifth, apply Ohm’s Law to obtain the voltage drops across Resistors R1, R2, and R3:V1 = I1R1 = (0.2686 amps)(50W) = 13.43 VoltsV2 = I2R2 = (0.3458 amps)(100W) = 34.58 VoltsV3 = (I2 - I1) R3 = (0.0772 amps)(200W) = 15.44 VoltsSixth, check the calculations by applying Kirchhoff’s Laws:Check 1: Apply Kirchhoff’s voltage law to the larger outer loop (Figure 41).The sum of the voltage drops around the loop is essentially zero. (Not exactly zero due toFigure 41 Applying Voltage Laws to Outer Looprounding off.)813.4334.584000.01 @ 0Therefore, the solution checks.Check 2: Use Kirchhoff’s current law at one of the junctions (Figure 42).Rev. 0 Page 53 ES-02
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