# Practice Test: Question Set - 02

1. A 4.7 MΩ resistor is in series with a 0.015 μF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
(A) 35 ms
(B) 352 ms
(C) 3.5 s
(D) 70.5 ms

2. Two 0.68 μF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
(A) 46.8 Ω
(B) 4.68 Ω
(C) 23.41 Ω
(D) 11.70 Ω

3. Capacitance is directly proportional to plate area and plate separation.
(A) True
(B) False

4. A 10 μF, 20 μF, 22 μF, and 100 μF capacitor are in parallel. The total capacitance is
(A) 2.43 μF
(B) 4.86 μF
(C) 100 μF
(D) 152 μF

5. Voltage leads current by 90° in a capacitor.
(A) True
(B) False

6. A capacitor of 2,000 pF is greater than
(A) 0.02 μF
(B) 0.002 μF
(C) 0.0002 μF
(D) 0.0000002 F

7. The true power in a capacitor is zero.
(A) True
(B) False

8. A 12 kHz voltage is applied to a 0.33 μF capacitor, and 200 mA of rms current is measured. What is the value of the voltage?
(A) 8 V
(B) 80 V
(C) 800 V
(D) 0.88 V

9. The ohm is the unit of capacitance.
(A) True
(B) False

10. When the plate area of a capacitor increases,
(A) The capacitance increases
(B) The capacitance decreases
(C) The capacitance is unaffected
(D) The voltage it can withstand increases

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