21. 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 ________.
(a) 3 V
(b) 6 V
(c) 4 V
(d) 0 V
22. When the plate area of a capacitor increases, ________.
(a) the capacitance increases
(b) the capacitance decreases
(c) the capacitance is unaffected
(d) the voltage it can withstand increases.
23. Two 0.68 μF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is ________.
(a) 46.8 Ω
(b) 4.68 Ω
(c) 23.41 Ω
(d) 11.70 Ω
24. Which of the following capacitors is polarized?
(a) mica
(b) ceramic
(c) plastic-film
(d) electrolytic
25. 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?
(a) 8 V
(b) 80 V
(c) 80 mV
(d) 800 mV
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5555555555 11. A capacitor of 0.02 μF is larger than ________. (a) 0.000020 F (b) 200,000 pF (c) 2,000 pF (d) all of the above- 5555555555 31. A 0.01 μF capacitor equals how many picofarads? (a) 100 pF (b) 1,000 pF (c) 10,000 pF (d) 100,000 pF
- 5555555555 30. A 0.00022 F capacitor equals how many microfarads? (a) 22 μF (b) 220 μF (c) 2,200 μF (d) 22,200 μF
- 5555555555 18. A capacitor of 2,000 pF is greater than ________. (a) 0.02 μF (b) 0.002 μF (c) 0.0002 μF (d) 0.0000002 F
- 5555555555 29. 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 ________. (a) 1 μF (b) 2 μF (c) 4 μF (d) 8 μF