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21 Cards in this Set

  • Front
  • Back

What is the dielectric?

List three factors that determine the capacitance of a capacitor?

A capacitor uses air as a dielectric and has a capacitance of 3 µF. A dielectric material is inserted between the plates without changing the spacing, and the capacitance becomes 15 µF. What is the dielectric constant of this material?

In what form is the energy of a capacitor stored?

Four capacitors having values of 20µF, 50µF, 40µF, and 60µF are connected in parallel. What is the total capacitance of this circuit?

Four capacitors having values of 20µF, 50µF, 40µF, and 60µF are connected in series. What is the total capacitance of this circuit?

A 22µ capacitor is connected in series with a 90KΩ resistor. How long will it take this capacitor to charge?

a

A 450 -pF capacitor has a total charge time of 0.5 seconds. How much resistance is connected in the series with the capacitor?

Can a non polarized capacitor be connected to a DC circuit?

Explain how an AC electrolytic capacitor be connected to a DC circuit?

What type of electrolytic capacitor will be permanently damaged if connected to the incorrect polarity?

A 500-nF capacitor is connected to a 300-kΩ resistor. What is the total charge time of this capacitor?

A film-type capacitor is marked 253 H. What are the capacitance value and tolerance of this capacitor.

A postage stamp mica capacitor has the following color marks starting at the upper left dot: yellow, vice, brown, green, no color, and blue. What are the capacitance value, tolerance, and voltage rating of this capacitor?

A postage stamp capacitor has the following color marks starting at the upper left dot: Black, orange, black, silver, and white. What are the capacitance value and tolerance of this capacitor?

a

Fill in the missing value


Res Ω Capacitance µ Time con. s Total time s


150 kΩ 100 µF ? ?


¡ = RC, TOTAL TIME = ¡ x 5

Fill in the missing value

Res Ω Capacitance µ Time con. s Total time s


350kΩ ? ? 35s


¡ = RC, TOTAL TIME = ¡ x 5

Fill in the missing value

Res Ω Capacitance µ Time con. s Total time s


? 350pF .05s ?


¡ = RC, TOTAL TIME = ¡ x 5

a

Two capacitors having values of 80µF and 60µF are connected in series. What is the total capacitance?

Three capacitors having values of 120µF, 20µF, and 470pF are connected in parallel. What is the total capacitance?

A 470µf capacitor is connected in series with a 120 kΩ resistor. How long will it take the capacitor to charge completely?

a