Flashcards in ITEC 220 Final Deck (16):
1
Capacitance
The ability of a device to store electrical energy in the form or an electrical charge
2
Capacitor
A device consisting of two plates separated by an insulating material
3
Dielectric
The material that separates the plates of a capacitor
4
Farad
The basic unit of measure of capacitance of a capacitor
5
When the capacitance value is increased, how is the charge affected?
The charge increases
6
If the capacitance value of a capacitor is doubled, and the applied voltage is halved, how is the charge affected?
Nothing happens
7
Dielectric constant
The ability of a material to concentrate electric flux lines.
8
Capacitance of a capacitor is determined by three factors
Type of dielectric used, plate area, and distance between plates
9
1 farad equals
10 to the 6th microfarads
10
I farad equals
10 to the 12th picrofarads
11
Working voltage or breakdown voltage
The potential between the plates of a capacitor at which the dielectric becomes a conductor
12
A capacitor is rated at 2 microfarads. What is the capacitance if the plate area is doubled?
4 microfarads
13
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
14
Decreasing the distance between the plates has what effect on capacitance?
The capacitance will increase
15
What form of energy is stored in the dielectric of a capacitor
Coulomb
16