ITEC 220 Final Flashcards
(16 cards)
Capacitance
The ability of a device to store electrical energy in the form or an electrical charge
Capacitor
A device consisting of two plates separated by an insulating material
Dielectric
The material that separates the plates of a capacitor
Farad
The basic unit of measure of capacitance of a capacitor
When the capacitance value is increased, how is the charge affected?
The charge increases
If the capacitance value of a capacitor is doubled, and the applied voltage is halved, how is the charge affected?
Nothing happens
Dielectric constant
The ability of a material to concentrate electric flux lines.
Capacitance of a capacitor is determined by three factors
Type of dielectric used, plate area, and distance between plates
1 farad equals
10 to the 6th microfarads
I farad equals
10 to the 12th picrofarads
Working voltage or breakdown voltage
The potential between the plates of a capacitor at which the dielectric becomes a conductor
A capacitor is rated at 2 microfarads. What is the capacitance if the plate area is doubled?
4 microfarads
If the dielectric of a capacitor is changed from paper to ceramic, what is the effect on capacitance?
The capacitance increases because ceramic can handle more flux lines
Decreasing the distance between the plates has what effect on capacitance?
The capacitance will increase
What form of energy is stored in the dielectric of a capacitor
Coulomb
How many picofarads are in a microfarad
1,000,000
