Capacitors problems
- 1. The material used between the plates of a capacitor is called its:
Options- A. insulation material
- B. dielectric material
- C. separation material
- D. plate-divider material Discuss
Correct Answer: dielectric material
- 2. After which time constant can a capacitor be considered to be fully charged?
Options- A. first
- B. third
- C. fifth
- D. seventh Discuss
Correct Answer: fifth
- 3. A capacitor and an output resistor 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
Correct Answer: a differentiator
- 4. Which of the following determines the capacitance of a capacitor?
Options- A. Plate area, dielectric strength, and plate separation
- B. Voltage rating, dielectric constant, and temperature coefficient
- C. Temperature coefficient, plate area, and plate separation
- D. Plate area, dielectric constant, and plate separation Discuss
Correct Answer: Plate area, dielectric constant, and plate separation
- 5. An 8 V power source is charging a capacitor. How many volts will be across the capacitor at the second time constant?
Options- A. 1 volt
- B. 3 volts
- C. 5 volts
- D. 7 volts Discuss
Correct Answer: 7 volts
- 6. As a capacitor is being charged, current flowing into the capacitor will:
Options- A. increase
- B. decrease
- C. remain the same
- D. cannot tell Discuss
Correct Answer: decrease
- 7. What is the value of a capacitor labeled 102?
Options- A. 10,000 pF
- B. 1000 pF
- C. 1000 µF
- D. 10,000 µF Discuss
Correct Answer: 1000 pF
- 8. A practical capacitor
Options- A. is a short to dc
- B. looks like a capacitor in parallel with a resistor
- C. is an open to ac
- D. stores energy in a magnetic field Discuss
Correct Answer: looks like a capacitor in parallel with a resistor
- 9. If a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?
Options- A. 5.0 V
- B. 12.8 V
- C. 13.5 V
- D. 20 V Discuss
Correct Answer: 20 V
- 10. What is the phase shift between the voltage across the resistor and the voltage from the source?
Options- A. VR leads VS by 17°
- B. VR leads VS by 73°
- C. VR lags VS by 73°
- D. VR lags VS by 17° Discuss
Correct Answer: VR leads VS by 73°
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