RLC Circuits and Resonance Questions

• What is the impedance of the circuit in the given circuit?
• At any resonant frequency, what net voltage is measured across the two series reactive components?
• What is the Q (Quality factor) of a series circuit that resonates at 6 kHz, has equal reactance of 4 kilo-ohms each, and a resistor value of 50 ohms?
• In a series RLC circuit the current can be found using:
• What is the phase angle?
• What is the resonant frequency in the given circuit?
• The resonant frequency fo is 19 kHz.
• When inductive and capacitive reactance are present in the same series circuit, the magnitude of the total reactance is equal to the sum of the magnitudes of the individual reactances.
• The quality factor of a parallel circuit at resonance is VC/VS or VL/VS.
• The less selective a filter is, the steeper the slope of its curves at the cutoff frequencies.
• In a series RLC circuit, at above resonance the circuit is more capacitive than it is inductive.
• The bandwidth of a filter is the range of frequencies between the half-power frequencies.
• With the frequency given, the circuit in the given circuit is operating above resonance.
• If the output voltage were taken from across the resistor in the given circuit, the circuit would be a band-pass filter.
• The impedance is 1177 Ω.
• The current through the inductor is 5 amps.
• If the given circuit were at resonance, the total current would be at its maximum.
• If the given circuit in were operating at resonance, the total current would be maximum.
• By increasing the resistance of a coil you can increase the Q of the coil at resonance.
• The current lags the voltage in the given circuit.