- A. Triples
- B. Is cut to one-third
- C. Stays the same
- D. Doubles
Capacitors
-
When the voltage across a capacitor is tripled, the stored charge_____.
-
Energy is stored by a capacitor in a magnetic field.
- A. True
- B. False
-
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
-
Two series capacitors (one 2 µF, the other of unknown value) are charged from a 24 V source. The 2 µF capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is_____.
- A. 1 µF
- B. 2 µF
- C. 4 µF
- D. 8 µF
-
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
-
A capacitor of 0.02 µF is larger than_____.
- A. 0.000020 F
- B. 200,000 pF
- C. 2,000 pF
- D. All of the above
-
Of the following capacitors, which one has the highest dielectric constant?
- A. Air
- B. Mica
- C. Glass
- D. Paper
-
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is_____.
- A. 48 µs
- B. 480 µs
- C. 2.42 µs
- D. 24 µs
-
XC is inversely proportional to frequency and capacitance.
- A. True
- B. False
-
Voltage leads current by 90° in a capacitor.
- A. True
- B. False