Engineering Board Exam Reviewer · RL Circuits · hard
A coil has 20 mH of inductance and 25, of series resistance. What is its quality factor Q=XL/R at 1 kHz?
- 0.8
- 31.6
- 5.03
- 0.199
Answer
C. 5.03
Solution
XL=2π fL=2π(1000)(0.02)=126, . Q=XL/R=126/25=5.03.
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