Electrical Engineering - RLC Circuits and Resonance

If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth

A 90 resistor, a coil with 30 of reactance, and a capacitor with 50 of reactance are in series across a 12 V ac source. The current through the resistor is

A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is

If the value of C in a series RLC circuit is decreased, the resonant frequency

A 24 resistor, an inductor with a reactance of 120 , and a capacitor with a reactance of 120 are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is