Chapter Questions
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 $3 \mu \mathrm{F}$. A dielectric material is inserted between the plates without changing the spacing, and the capacitance becomes $15 \mu \mathrm{F}$. What is the dielectric constant of this material?
In what form is the energy of a capacitor stored?
Four capacitors having values of $20 \mu \mathrm{F}, 50 \mu \mathrm{F}, 40 \mu \mathrm{F}$, and $60 \mu \mathrm{F}$ are connected in parallel. What is the total capacitance of this circuit?
If the four capacitors in Question 5 were to be connected in series, what would be the total capacitance of the circuit?
A $22-\mu \mathrm{F}$ capacitor is connected in series with a $90-\mathrm{k} \Omega$ resistor. How long will it take this capacitor to charge?
A $450-\mathrm{pF}$ capacitor has a total charge time of 0.5 second. How much resistance is connected in series with the capacitor?
Can a nonpolarized capacitor be connected to a DC circuit?
Explain how an AC electrolytic capacitor is constructed.
What type of electrolytic capacitor will be permanently damaged if connected to the incorrect polarity?
A $500-\mathrm{nF}$ capacitor is connected to a $300-\mathrm{k} \Omega$ resistor. What is the total charge time of this capacitor?
A film-type capacitor is marked $253 \mathrm{H}$. 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, violet, 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, orange, black, silver, and white. What are the capacitance value and tolerance of this capacitor?