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A capacitor, inductor and resistor are connected in series across an AC source. When the source frequency is f, the phase angle is positive (φ > 0, where the phase angle is defined to be positive if the voltage leads the current). Which best describes the frequency frelative to the resonance frequency f₀?
- f < f₀
- f = f₀
- f > f₀
- The frequency could be any of the above.