Engineering Board Exam Reviewer · RC Circuits · easy

In the series RC circuit shown, a 40 V (rms) source with =5000 rad/s is connected to R=12, and C=12.5, F. Find the magnitude of the total impedance.

  1. 28,
  2. 20,
  3. 12,
  4. 16,

Answer

B. 20,

Solution

XC=1/ C= 1(5000)(12.5, F)=16, . |Z|=sqrt(R2+XC2)=sqrt((12, )2+(16, )2)=20, .

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