# Practice Test: Question Set - 01

1. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
(A) Increases
(B) Remains constant
(C) Decreases
(D) Ceases

2. Two series capacitors (one 2 Î¼F, the other of unknown value) are charged from a 24 V source. The 2 Î¼F capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is
(A) 1 Î¼F
(B) 2 Î¼F
(C) 4 Î¼F
(D) 8 Î¼F

3. Total parallel capacitance is less than that of the smallest capacitor in parallel.
(A) True
(B) False

4. A 2 Î¼F, a 4 Î¼F, and a 10 Î¼F capacitor are connected in series. The total capacitance is less than
(A) 2 Î¼F
(B) 4 Î¼F
(C) 10 Î¼F
(D) 1.5 Î¼F

5. Xis inversely proportional to frequency and capacitance.
(A) True
(B) False

6. An uncharged capacitor and a 1 kÎ© resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
(A) 6 V
(B) 3 V
(C) 2 V
(D) 0 V

7. A capacitor blocks A.C. but passes D.C.
(A) True
(B) False

8. A 220 Î© resistor is in series with a 2.2 Î¼F capacitor. The time constant is
(A) 48 Î¼s
(B) 480 Î¼s
(C) 2.42 Î¼s
(D) 24 Î¼s

9. The dielectric constant is the ability of a material to establish an electric field.
(A) True
(B) False

10. A capacitor of 0.02 Î¼F is larger than
(A) 0.000020 F
(B) 200,000 pF
(C) 2,000 pF
(D) All of the above

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