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

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

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

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AC Fundamentals, Circuit and Circuit Theory
Capacitive reactance is more when

Capacitance is more and frequency of supply is less
Capacitance is less and frequency of supply is less
Capacitance is less and frequency of supply is more
Capacitance is more and frequency of supply is more

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