A resonance curve for RLC series circuit is a plot of frequency versus :
Correct answer: B. Current
- A. Voltage
- B. Current
- C. Impedance
- D. Reactance
Explanation
In a series RLC circuit, resonance occurs when the inductivereactance equals the capacitive reactance.At this resonant frequency:The circuit impedance is minimum (equal to just the resistance ).Therefore, the current becomes maximum.A resonance curve shows how the current changes withfrequency, peaking sharply at the resonant frequency.So, the resonance curve is a plot of frequency vs. current.
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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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