Engineering Board Exam Reviewer · RLC Circuits and Resonance · medium
A series RLC circuit is operated at a frequency above its resonant frequency. The circuit is
- capacitive, with the current leading the voltage
- resistive, with the current in phase
- inductive, with the current leading the voltage
- inductive, with the current lagging the voltage
Answer
D. inductive, with the current lagging the voltage
Solution
Above resonance XL=2π fL has grown and XC=1/2π fC has shrunk, so XL>XC: the circuit is inductive and the current lags the voltage.
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