26. A 0.47 μF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is ________.
(a) 170 Ω
(b) 17 Ω
(c) 0.000169 Ω
(d) 1.7 Ω
27. A 220 Ω resistor is in series with a 2.2 μF capacitor. The time constant is ________.
(a) 48 μs
(b) 480 μs
(c) 2.42 μs
(d) 24 μs
28. 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?
(a) 28 ms
(b) 282 ms
(c) 3.5 s
(d) 70.5 ms
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
30. A 0.00022 F capacitor equals how many microfarads?
(a) 22 μF
(b) 220 μF
(c) 2,200 μF
(d) 22,200 μF
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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