Capacitors MCQs
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Capacitors MCQs
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25 Questions

1. When the plate area of a capacitor increases,
2. A capacitor blocks A.C. but passes D.C.
3. XC is inversely proportional to frequency and capacitance.
4. A capacitor of 2,000 pF is greater than
5. A 4.7 MΩ resistor is in series with a 0.015 μF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
6. A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
7. The dielectric constant is the ability of a material to establish an electric field.
8. What is the capacitance when Q = 60 μC and V = 12 V?
9. When the voltage across a capacitor is tripled, the stored charge
10. A 12 kHz voltage is applied to a 0.33 μF capacitor, and 200 mA of rms current is measured. What is the value of the voltage?
11. 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
12. The ohm is the unit of capacitance.
13. A 10 μF, 20 μF, 22 μF, and 100 μF capacitor are in parallel. The total capacitance is
14. An uncharged capacitor and a 1 kΩ 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
15. The true power in a capacitor is zero.
16. Two series capacitors (one 2 μF, the other of unknown value) are charged from a 24 V source. The 2 μF capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is
17. Total parallel capacitance is less than that of the smallest capacitor in parallel.
18. A 220 Ω resistor is in series with a 2.2 μF capacitor. The time constant is
19. Four 0.15 μF capacitors are in parallel. The total capacitance is
20. A 2 μF, a 4 μF, and a 10 μF capacitor are connected in series. The total capacitance is less than
21. Energy is stored by a capacitor in a magnetic field.
22. Two 0.68 μF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
23. Of the following capacitors, which one has the highest dielectric constant?
24. A 0.00022 F capacitor equals how many microfarads?
25. Voltage leads current by 90° in a capacitor.

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