Engineering Board Exam Reviewer · Circuit Theorems and Conversions · medium
For the circuit shown, V=36 V, R1=8, , and R2=4, . Find the Thevenin voltage VTh seen at terminals a-b.
- 36 V
- 24 V
- 12 V
- 18 V
Answer
C. 12 V
Solution
With a-b open, no current flows to the right of R2, so VTh is the voltage across R2. By the voltage divider rule: VTh=VR2/R1+R2=(36 V)4, /8, +4, =12 V.
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