Engineering Board Exam Reviewer · Circuit Theorems and Conversions · medium
For the circuit shown, V=24 V, R1=4, , R2=12, , and R3=8, . Find the Thevenin voltage VTh at terminals a-b.
- 12 V
- 24 V
- 18 V
- 6 V
Answer
C. 18 V
Solution
With a-b open, there is no current in R3 and therefore no drop across it. So VTh is the voltage across R2: VTh=VR2/R1+R2=18 V.
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