RLC Circuits and Resonance Online Test – Multiple Choice Questions and Answers 1. Which statement best describes reactance in a series RLC circuit? Resistance is always dominant The larger of the two reactances is dominant Inductive reactance is always dominant Capacitive reactance is always dominant 2. At any resonant frequency, what net voltage is measured across the two series reactive components? Reactive voltage Zero voltage Applied voltage VL + VC voltage 3. At any resonant frequency, what voltage is measured across the two series reactive components? applied inductive and capacitive reactive zero 4. When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a: bandpass filter low-pass filter high-pass filter band-stop filter 5. What would be the power factor for an RLC circuit that acts inductively? +90 degrees leading –90 degrees lagging one zero 6. 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? 50 80 0.001 4.0 7. Voltage lags current in an RLC circuit when it acts: capacitively resistively inductively resonantly 8. Current in a series RLC circuit may always be used as: a leading vector a lagging vector a reference an angle 9. If the bandwidth of a filter increases: the center frequency decreases the half-power frequency decreases Q decreases the roll-off rate increases 10. What effect will a parallel tank have upon final filter current? The impedance will block output The frequency cutoff will change The bandpass frequencies will change very little Loading … Question 1 of 10
