Discussion
Home ‣ Electrical Engineering ‣ Capacitors Comments
- Question
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?
Options- A. 8 V
- B. 80 V
- C. 80 mV
- D. 800 mV
- Correct Answer
- 8 V
- 1. 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
- 2. Of the following capacitors, which one has the highest dielectric constant?
Options- A. air
- B. mica
- C. glass
- D. paper Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
Options- A. 2.43 µF
- B. 4.86 µF
- C. 100 µF
- D. 152 µF Discuss
- 7. Which of the following capacitors is polarized?
Options- A. mica
- B. ceramic
- C. plastic-film
- D. electrolytic Discuss
- 8. When the voltage across a capacitor is tripled, the stored charge
Options- A. triples
- B. is cut to one-third
- C. stays the same
- D. doubles Discuss
- 9. 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
Options- A. VR > VC
- B. VC > VR
- C. VR = VC
- D. VR and VC = 0 Discuss
- 10. In Question 6, the capacitor will reach full charge in a time equal to approximately
Options- A. 6 RC
- B. 5 RC
- C. RC
- D. none of the above Discuss
Capacitors problems
Search Results
Correct Answer: 352 ms
Correct Answer: glass
Correct Answer: 220 µF
Correct Answer: 480 µs
Correct Answer: 0.6 µF
Correct Answer: 152 µF
Correct Answer: electrolytic
Correct Answer: triples
Correct Answer: VR > VC
Correct Answer: 5 RC
Comments
There are no comments.More in Electrical Engineering:
Programming
Copyright İCuriousTab. All rights reserved.