Capacitance Flashcards
1
Q
Define 1 Farad.
A
the capacitance when 1V appears across a capacitor’s plates when a charge of 1C is stored.
2
Q
What is capacitance?
A
the ability of a body to hold an electric charge
3
Q
What is a capacitor made up of?
A
2 metal sheets rolled up with an insulator between the, (called the dielectric).
4
Q
Why is there an insulator within a capacitor?
A
to stop charge conducting between them
5
Q
How do you calculate charge of a capacitor?
A
Q = CV
6
Q
What is the time constant?
A
RC, the time constant controls how quickly a capacitor will discharge
7
Q
What is the relative permittivity of a dialectric.
A
the ability of the substance to store electrical energy in an electric field, relative to its surroundings
