EEE :: RLC Circuits and Resonance
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If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth
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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
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If the value of C in a series RLC circuit is decreased, the resonant frequency
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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 -
To tune a parallel resonant circuit to a higher frequency, the capacitance should be
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In a certain series resonant circuit, VC = 125 V, VL = 125 V, and VR = 40 V. The value of the source voltage is
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A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will
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A 9 mH coil is in parallel with a 0.015
F capacitor across an 18 kHz ac source. The coil's internal resistance, RW, is 60 . The circuit impedance is -
A 15
resistor, an inductor with 8 inductive reactance, and a capacitor with 12 capacitive reactance are in parallel across an ac voltage source. The circuit impedance is
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