Electronics-Capacitor Question and Answer
Electronics-Capacitor Question and Answer
11. In an ac circuit, an output capacitor and a resistor are connected in series with an ac signal. What filter action will be the result?
- bandpass
- low-pass
- high-pass
- band-stop
12. What is the total opposition to current in a series RC circuit called?
- impedance
- inductance
- reactance
- resistance
13. What is the total opposition to current in a series RC circuit called?
- impedance
- inductance
- reactance
- resistance
14. In a capacitive circuit, current flow is limited to
- charging periods
- discharging periods
- neither charging periods nor discharging periods
- both charging periods and discharging periods
15. A capacitor is constructed of two parallel:
- conductors
- semiconductors
- inductors
- dielectrics
16. Which of the following determines the capacitance of a capacitor?
- Plate area, dielectric strength, and plate separation
- Voltage rating, dielectric constant, and temperature coefficient
- Temperature coefficient, plate area, and plate separation
- Plate area, dielectric constant, and plate separation
17. Most older types of paper capacitors have been replaced by which type of construction?
- electrolytic
- plastic film
- oxide casing
- waxed paper
18. What is the impedance of a series RC circuit that consists of a 0.22 F capacitor and a 200-ohm resistor connected to a 3 kHz source?
- 214 ohms
- 313 ohms
- 414 ohms
- 880 ohms
19. What is the reactance value for a capacitor installed in a dc circuit?
- zero
- moderate
- infinite
- cannot tell
20. In a purely capacitive circuit,
- current leads voltage by 90°
- voltage leads current by 90°
- current lags voltage by 90°
- current and voltage have a phase relationship of 0°