Discussion
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- Question
How long would it take the capacitor in the given circuit to completely charge if the switch was in position 1?
Options- A. 22 ms
- B. 69 ms
- C. 345 ms
- D. 440 ms
- Correct Answer
- 345 ms
- 1. If C1, a 4.7 µF capacitor, and C2, a 3.3 µF capacitor are in series with 18 Vdc applied, what is the voltage across C1?
Options- A. 3.3 V
- B. 7.4 V
- C. 6.6 V
- D. 9.4 V Discuss
- 2. Which of the following statements is true?
Options- A. The voltage to which a capacitor is charged can change instantaneously.
- B. The current in a capacitive circuit takes time to change.
- C. A fully charged capacitor appears as a short to dc current.
- D. An uncharged capacitor appears as a short to an instantaneous change in current. Discuss
- 3. What is the dc charging/discharging time constant for the circuit?
Options- A. 294 ps
- B. 13.5 ms
- C. 21.25 ms
- D. 2.16 Gs Discuss
- 4. What do variable capacitors use for dielectric?
Options- A. ceramic, electrolytic, mica, or paper
- B. air, ceramic, mica, or plastic
- C. ceramic, paper, plastic, or mica
- D. mica, ceramic, plastic, or electrolytic Discuss
- 5. A resistor and an output capacitor form a series circuit with a square wave applied. The circuit is:
Options- A. an integrator
- B. a differentiator
- C. a multiplier
- D. a divider Discuss
- 6. The strength of an electric field at a given point is proportional to the potential difference on the plates and inversely proportional to the:
Options- A. plate separation
- B. negative plate only
- C. field strength
- D. charge difference Discuss
- 7. What is the value of a capacitor that can store two coulombs of charge when 500 volts is applied across its plates?
Options- A. 4 µF
- B. 250 µF
- C. 4,000 µF
- D. 250 F Discuss
- 8. When a circuit consists of a capacitor and a resistor in series with a voltage source, and the voltage across the resistor is zero, then the capacitor is:
Options- A. charging
- B. discharging
- C. fully charged
- D. fully discharged Discuss
- 9. In a capacitive circuit, current flow is limited to
Options- A. charging periods
- B. discharging periods
- C. neither charging periods nor discharging periods
- D. both charging periods and discharging periods Discuss
- 10. What is the total opposition to current in a series RC circuit called?
Options- A. impedance
- B. inductance
- C. reactance
- D. resistance Discuss
Capacitors problems
Search Results
Correct Answer: 7.4 V
Correct Answer: An uncharged capacitor appears as a short to an instantaneous change in current.
Correct Answer: 21.25 ms
Correct Answer: air, ceramic, mica, or plastic
Correct Answer: an integrator
Correct Answer: plate separation
Correct Answer: 4,000 µF
Correct Answer: fully charged
Correct Answer: both charging periods and discharging periods
Correct Answer: impedance
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