Engineering Board Exam Reviewer · RL Circuits · easy

In the series RL circuit shown, a 145 V (rms) source with =500 rad/s is connected to R=42, and L=80 mH. Find the magnitude of the total impedance.

  1. 82,
  2. 42,
  3. 58,
  4. 116,

Answer

C. 58,

Solution

XL= L=(500)(80 mH)=40, . |Z|=sqrt(R2+XL2)=sqrt((42, )2+(40, )2)=58, .

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