# Resonance frequency

The above left is an RLC series circuit, where the resistance of the resistor, the self-inductance of the inductor and the capacitance of the capacitor are $$R$$, $$L$$ and $$C$$, respectively. The above right shows the current intensity as a function of the frequency of the AC power supply, where $$f_0$$ is the resonance frequency of this circuit. Which of the following methods can make the resonance frequency greater than $$f_0$$?

a) Replacing the inductor with one that has an inductance greater than $$L.$$
b) Replacing the capacitor with one that has a conductance greater than $$C.$$
c) Connecting more capacitors with capacitance $$C$$ in series to the existing capacitor.

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