Engineering Board Exam Reviewer · RLC Circuits and Resonance · medium

A series RLC circuit has R=5, , L=20 mH, and C=0.2, F. Find its quality factor at resonance.

  1. 63.2
  2. 10.1
  3. 126
  4. 31.6

Answer

A. 63.2

Solution

0= 1sqrt(LC)= 1 (0.02)(0.2×10-6)=15811 rad/s. Q= 0L/R=(15811)(0.02)/5=63.2.

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