Discussion
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- Question
A 0.01 µF capacitor equals how many picofarads?
Options- A. 100 pF
- B. 1,000 pF
- C. 10,000 pF
- D. 100,000 pF
- Correct Answer
- 10,000 pF
- 1. What is the capacitance when Q = 60 µC and V = 12 V?
Options- A. 720 µF
- B. 5 µF
- C. 50 µF
- D. 12 µF Discuss
- 2. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
Options- A. increases
- B. remains constant
- C. decreases
- D. ceases Discuss
- 3. Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
Options- A. 46.8 Ω
- B. 4.68 Ω
- C. 23.41 Ω
- D. 11.70 Ω Discuss
- 4. 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
Options- A. 6 V
- B. 3 V
- C. 2 V
- D. 0 V Discuss
- 5. 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
Options- A. 1 µF
- B. 2 µF
- C. 4 µF
- D. 8 µF Discuss
- 6. Four 0.15 µF capacitors are in parallel. The total capacitance is
Options- A. 0.15 µF
- B. 0.30 µF
- C. 0.6 µF
- D. 0.8 µF Discuss
- 7. A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
Options- A. 48 µs
- B. 480 µs
- C. 2.42 µs
- D. 24 µs Discuss
- 8. A 0.00022 F capacitor equals how many microfarads?
Options- A. 22 µF
- B. 220 µF
- C. 2,200 µF
- D. 22,200 µF Discuss
- 9. Of the following capacitors, which one has the highest dielectric constant?
Options- A. air
- B. mica
- C. glass
- D. paper Discuss
- 10. 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?
Options- A. 35 ms
- B. 352 ms
- C. 3.5 s
- D. 70.5 ms Discuss
Capacitors problems
Search Results
Correct Answer: 5 µF
Correct Answer: decreases
Correct Answer: 46.8 Ω
Correct Answer: 0 V
Correct Answer: 4 µF
Correct Answer: 0.6 µF
Correct Answer: 480 µs
Correct Answer: 220 µF
Correct Answer: glass
Correct Answer: 352 ms
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