Engineering Board Exam Reviewer · Series-Parallel Circuits · easy
In the series-parallel circuit shown, V=42 V, R1=6, , R2=20, , and R3=60, . Find the total resistance seen by the source.
- 21,
- 86,
- 4.29,
- 18.14,
Answer
A. 21,
Solution
R2 and R3 are in parallel: R23=R2R3/R2+R3=(20, )(60, )/20, +60, =15, . This is in series with R1: RT=R1+R23=6, +15, =21, .
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