An LCR series circuit contains L=8 H,C=0.5μF, and R=100Ω. The resonant frequency of the circuit is
Correct answer: A. 1000/π Hz
- A. 1000/π Hz
- B. 250/π Hz
- C. 500/π Hz
- D. 125/π Hz
Explanation
The resonant frequency of an LCR series circuit is given by the formula f0 =1/2πLC . Substituting the given values, we get: f0 =1/2π[(8)(0.5×10−6)]^1/2
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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