Engineering Board Exam Reviewer · RLC Circuits and Resonance · hard
A practical parallel resonant circuit consists of a coil (L=100, H, series resistance 10, ) in parallel with a 100 pF capacitor. Using the high-Q approximation, find the impedance at resonance.
- 10 k
- 100 k
- 15.9 k
- 200 k
Answer
B. 100 k
Solution
At resonance (high Q) Zr=L/RC= 100×10-6(10)(100×10-12)=100 k .
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