Engineering Board Exam Reviewer · Circuit Theorems and Conversions · hard
Three branches are connected in parallel as shown, with V1=6 V, V2=6 V, V3=30 V, R1=12, , R2=12, , and R3=12, . Use Millman's theorem to find the voltage Vab across the terminals.
- 30 V
- 28 V
- 7 V
- 14 V
Answer
D. 14 V
Solution
Millman's theorem: Vab= Vk/Rk/ 1/Rk. The numerator is 3.5 A and the denominator is 1/4 S, so Vab= 3.5 A1/4 S=14 V.
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