Engineering Board Exam Reviewer · Series-Parallel Circuits · hard
In the circuit shown, V=120 V, R1=12, , R2=12, , R3=8, , and R4=30, . Find the voltage across R2.
- 60 V
- 24 V
- 36 V
- 72 V
Answer
C. 36 V
Solution
Vp=ITRp=(5 A)(12, )=60 V. The branch R2+R3=20, carries Ib= 60 V20, =3 A, so VR2=IbR2=(3 A)(12, )=36 V.
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