3RD Flashcards
Potential difference between two points in space (or a unit)
VOLTAGE
Device to store energy as potential energy in an electric field.
CAPACITOR
the charge on the plates of a capacitor divided by the potential difference of the plates c = q/v
CAPACITANCE
Unit of capacitance, 1F=1 c/v. This is a very large unit of capacitance, in practice we use uF (1x10^-6) or pF(1x10^-12)
FARAD
A path through which charge can flow
ELECTRIC CIRCUIT
Device maintains a potential difference (V) between its terminals by means of an internal electrochemical reaction.
BATTERY
Points at which charge can enter or leave a battery
TERMINALS
It is formed from two conducting plates separated by a thin layer called dielectric.
CAPACITOR
Is the ability of the capacitor to store electric charges, it is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.
CAPACITANCE
Formula for capacitance
C = q/v
q = it
Two sheets of foil separated by a thin plastic film and rolled up to save space. Values: 1pF to 1nF.
POLYSTERINE
Alternate laters of metal and ceramic, Values: 1 nF to 1uF.
CERAMIC
Two sheets of aluminum foil separated by paper soaked in conducting _______. The insulator is a thin oxide layer on one of the foils, values: 1uF to 10mF.
ELECTROLYTIC CAPACITORS
The foil with the oxide layer must be at a ______ voltage relative to the other (else explosion)
POSITIVE
