The impedance of pure anti-resonant which at resonance is:
Correct answer: D. ∝
- A. 0
- B. 1/2
- C. 1
- D. ∝
Explanation
The impedance of a pure anti-resonant circuit is infinite (∝) at resonance. This occurs because at anti-resonance, the circuit impedes the flow of current as much as possible. Therefore, the correct option is 4. ∝.
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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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