Engineering Board Exam Reviewer · RC Circuits · medium

In the series RC circuit shown, a 232 V (rms) source with =5000 rad/s is connected to R=84, and C=2.5, F. Find the current drawn from the source.

  1. 2.76 A
  2. 1.41 A
  3. 2 A
  4. 4 A

Answer

C. 2 A

Solution

XC=1/ C= 1(5000)(2.5, F)=80, . |Z|=sqrt(R2+XC2)=sqrt((84, )2+(80, )2)=116, . I=V/|Z|= 232 V116, =2 A.

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