Definition of capacitance
Amount of charge (in coulumbs) per volt of potential difference storied by a capacitor
What is permittivity
Measure of how difficult it is to an to generate an electric field in a certain material
How to find relative permittivity (RP)
P of material/ P of free space
What is relative permittivity also known as?
The dialectic constant
What happens when a charge is applied to a capacitor?
An electric field is generated
Are molecules in a capacitor attracted to the same or opposite charge of the end of the molcule?
Opposite
What happens to molecules is a charged capacitor after they’ve rotated?
They get an electric field which opposes the applied electric field of the capacitor
Is more or less energy storied by the capacitor when the capacitance is high?
More
What happens to current when charging a capacitor?
Decreases exponentially
What happens to V/t graph when charging a capacitor?
V increase exponential then equals out when fully charged
Time for charge/pd/current to half for a discharging capacitor
0.69RC
What is 1 time constant?
Time for pd/current/charge of a discharging capacity to fall 37%
