RLC Circuits and Resonance Online Test – Multiple Choice Questions and Answers 1. Voltage lags current in an RLC circuit when it acts: capacitively resistively inductively resonantly 2. What would be the power factor for an RLC circuit that acts inductively? +90 degrees leading –90 degrees lagging one zero 3. At any resonant frequency, what net voltage is measured across the two series reactive components? Reactive voltage Zero voltage Applied voltage VL + VC voltage 4. At any resonant frequency, what voltage is measured across the two series reactive components? applied inductive and capacitive reactive zero 5. 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 6. 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 7. 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 8. 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 9. Current in a series RLC circuit may always be used as: a leading vector a lagging vector a reference an angle 10. If the bandwidth of a filter increases: the center frequency decreases the half-power frequency decreases Q decreases the roll-off rate increases Loading … Question 1 of 10
