Engineering Board Exam Reviewer · Series-Parallel Circuits · medium
In the series-parallel circuit shown, V=90 V, R1=6, , R2=40, , and R3=60, . Find the voltage across the parallel combination of R2 and R3.
- 72 V
- 78.26 V
- 18 V
- 144 V
Answer
A. 72 V
Solution
IT=3 A and R23=24, , so the parallel voltage is V23=ITR23=(3 A)(24, )=72 V. (Check: V-VR1=90 V-18 V.)
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