If C1, a 4.7 �F capacitor, and C2, a 3.3 �F capacitor are in series with 18 Vdc

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Question
If C₁, a 4.7 µF capacitor, and C₂, a 3.3 µF capacitor are in series with 18 V_dc applied, what is the voltage across C₁?
Options
A. 3.3 V
B. 7.4 V
C. 6.6 V
D. 9.4 V

Correct Answer

7.4 V

Capacitors problems

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1. 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.

3. 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

7. 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

9. 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

10. 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

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