AC Fundamentals, Circuit and Circuit Theory
The series and parallel resonance on L-C circuit' differs in that

Series resonance needs a high-resistance source for sharp increase in current
Parallel resonance needs a low-resistance source for a sharp rise in line current
Series resistance needs a low-resistance source for sharp rise in current
Parallel resonance needs a low-resistance source for a sharp increase in impedance

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AC Fundamentals, Circuit and Circuit Theory
In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value

Will increase the selectivity of the circuit
Will change the maximum value of current at resonance
Will change the resonance frequency
Will change the impedance at resonance frequency

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