When either L or C is increased, the resonant frequency of the RLC series circuit:
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Remains the same
- D. Becomes zero
Explanation
This is the correct answer. At higher frequencies, capacitive reactance decreases. The formula for capacitive reactance is Xc = 1 / (2πfC), where f is the frequency and C is the capacitance. As f increases, Xc decreases.
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About Alternating Current
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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