Engineering Board Exam Reviewer · Series-Parallel Circuits · medium
In the circuit shown, V=128 V, R1=20, , R2=30, , and RL=20, . Find the voltage across the load RL.
- 76.8 V
- 48 V
- 64 V
- 96 V
Answer
B. 48 V
Solution
The load is in parallel with R2: R2L=(30, )(20, )/30, +20, =12, . By the voltage divider rule, VL=V R2LR1+R2L=(128 V)12, /20, +12, =48 V.
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