Electronics-RLC Circuits and Resonance
Electronics-RLC Circuits and Resonance
1. 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?
- 0.001
- 50
- 80
- 4.0
2. What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?
- 100.0 kHz to 155.0 kHz
- 147.5 kHz to 152.5 kHz
- 4500 kHz to 295.5 kHz
- 149,970 Hz to 150,030 Hz
3. What effect will a parallel tank have upon final filter current?
- very little
- The bandpass frequencies will change.
- The frequency cutoff will change.
- The impedance will block output.
4. When a parallel circuit resonates it is said to:
- flywheel
- oscillate
- both of the above
- none of the above
5. When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a:
- low-pass filter
- high-pass filter
- band-stop filter
- bandpass filter
6. At resonance, the term bandwidth includes all frequencies that allow what percentage of maximum current to flow?
- 50
- 62.3
- 70.7
- 95.3
7. What is the true power consumed in a 30 V series RLC circuit if Z = 20 ohms and R = 10 ohms?
- 15.0 watts
- 22.5 watts
- 30.0 watts
- 45.0 watts
8. What is the current phase angle for a parallel RLC circuit when IL = 15.3 A, IC = 0.43 A, and IR = 3.5 A?
- 76.7 degrees
- –4.25 degrees
- 88.8 degrees
- –76.7 degrees
9. At any resonant frequency, what voltage is measured across the two series reactive components?
- applied
- reactive
- zero
- inductive and capacitive
10. At any resonant frequency, what net voltage is measured across the two series reactive components?
- Applied voltage
- Reactive voltage
- Zero voltage
- VL + VC voltage