Engineering Board Exam Reviewer · Parallel Circuits · hard
A source supplies 12 A to two parallel branches whose currents differ by 4 A. The weaker branch has a resistance of 15, . What is the source voltage?
- 120 V
- 90 V
- 30 V
- 60 V
Answer
D. 60 V
Solution
I1+I2=12 and I1-I2=4 I1=8 A, I2=4 A. The weaker branch: V=I2R=(4)(15)=60 V.
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