Discussion
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- Question
What is the reactive power?
Options- A. 6.8 mW
- B. 9.8 mW
- C. 12.8 mW
- D. 15.8 mW
- Correct Answer
- 9.8 mW
- 1. What is the power factor if the apparent power of a circuit is 5 W, while the true power is 4 W?
Options- A. 0.0 W
- B. 0.8 W
- C. 1.0 W
- D. 1.25 W Discuss
- 2. After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?
Options- A. 63.2
- B. 36.8
- C. 13.5
- D. 5.0 Discuss
- 3. What is the angle theta value for a 5.6 µF capacitor and a 50-ohm resistor in series with a 1.1 kHz, 5 Vac source?
Options- A. 27.3 degrees
- B. 62.7 degrees
- C. ?27.3 degrees
- D. ?62.7 degrees Discuss
- 4. For a given charge difference, electrostatic field strength varies according to:
Options- A. plate differential
- B. plate area
- C. plate distance
- D. dielectric quantity Discuss
- 5. How is ac current related to ac voltage in a purely capacitive circuit?
Options- A. AC current is 0.707 of the ac voltage.
- B. AC current lags ac voltage.
- C. AC current is 0.637 of the ac voltage.
- D. AC current leads ac voltage. Discuss
- 6. What is the circuit's total current?
Options- A. 4.57 mA
- B. 9.327 mA
- C. 11.570 mA
- D. 13.830 mA Discuss
- 7. Capacitor value markings are usually:
Options- A. alphanumeric
- B. color dabs
- C. standard
- D. white print Discuss
- 8. A capacitor has 25 V across its plates and a stored charge of 1500 µC. What is the capacitance value?
Options- A. 60 pF
- B. 60 µF
- C. 16.67 mF
- D. 37.5 mF Discuss
- 9. What is the impedance of a series RC circuit that consists of a 0.22 µF capacitor and a 200-ohm resistor connected to a 3 kHz source?
Options- A. 214 ohms
- B. 313 ohms
- C. 414 ohms
- D. 880 ohms Discuss
- 10. What will a 1 µF capacitor store?
Options- A. one coulomb of charge
- B. 6.24 x 1012 electrons
- C. one volt
- D. one µA of current Discuss
Capacitors problems
Search Results
Correct Answer: 0.8 W
Correct Answer: 36.8
Correct Answer: ?27.3 degrees
Correct Answer: plate area
Correct Answer: AC current leads ac voltage.
Correct Answer: 4.57 mA
Correct Answer: alphanumeric
Correct Answer: 60 µF
Correct Answer: 313 ohms
Correct Answer: 6.24 x 1012 electrons
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