1. A 0.47 F capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is
2. Four 0.15 F capacitors are in parallel. The total capacitance is
3. Which of the following capacitors is polarized?
4. A capacitor of 2,000 pF is greater than
5. A 220 resistor is in series with a 2.2 F capacitor. The time constant is
6. A 4.7 M resistor is in series with a 0.015 F capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
7. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
8. Of the following capacitors, which one has the highest dielectric constant?
9. A 0.01 F capacitor equals how many picofarads?
10. A 12 kHz voltage is applied to a 0.33 F capacitor, and 200 mA of rms current is measured. What is the value of the voltage?
11. A 0.00022 F capacitor equals how many microfarads?
12. Two series capacitors (one 2 F, the other of unknown value) are charged from a 24 V source. The 2 F capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is
13. A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is
14. A 2 F, a 4 F, and a 10 F capacitor are connected in series. The total capacitance is less than
15. When the plate area of a capacitor increases,
16. Two 0.68 F capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
17. An uncharged capacitor and a 1 k resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
18. When the voltage across a capacitor is tripled, the stored charge
19. XC is inversely proportional to frequency and capacitance.
20. Voltage leads current by 90° in a capacitor.
21. The dielectric constant is the ability of a material to establish an electric field.
22. Total parallel capacitance is less than that of the smallest capacitor in parallel.
23. The ohm is the unit of capacitance.
24. Five time constants are required for a capacitor to charge fully or discharge fully.
25. Capacitance is directly proportional to plate area and plate separation.