Engineering Board Exam Reviewer · Series-Parallel Circuits · medium
In the series-parallel circuit shown, V=108 V, R1=15, , R2=30, , and R3=20, . Find the voltage across R1.
- 24.92 V
- 54 V
- 48 V
- 60 V
Answer
D. 60 V
Solution
IT=V/RT= 108 V27, =4 A. All of the total current flows through R1, so VR1=ITR1=(4 A)(15, )=60 V.
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