Engineering Board Exam Reviewer · Branch, Loop and Node Analyses · medium
In the circuit shown, I1=10 A, I2=2 A, R1=25, , R2=10, , and R3=40, . Use nodal analysis, with the bottom wire as the reference (0 V). Find the voltage at node A.
- 250 V
- 166.67 V
- 140 V
- 96 V
Answer
C. 140 V
Solution
Node A: I1=VA/R1+VA-VB/R2 10 A=VA/25, +VA-VB/10, . Node B: VA-VB/R2=VB/R3+I2 A-VB/10, =VB/40, +2 A. Solving: VA=140 V and VB=96 V.
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