Engineering Board Exam Reviewer · RL Circuits · medium
In the series RL circuit shown, a 50 V (rms) source with =1000 rad/s is connected to R=28, and L=96 mH. Find the voltage across the resistor.
- 14 V
- 11.3 V
- 2 V
- 50 V
Answer
A. 14 V
Solution
XL= L=(1000)(96 mH)=96, . |Z|=sqrt(R2+XL2)=sqrt((28, )2+(96, )2)=100, . I=V/|Z|= 50 V100, =0.5 A. VR=IR=(0.5 A)(28, )=14 V.
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