21. Capacitance Flashcards
(8 cards)
1
Q
What is a capacitor and what does it consist of?
A
An electrical component in which charge is separated
Consists of 2 metallic plates separated from each other by an insulator (dielectric)
2
Q
When is a capacitor fully charged?
A
When p.d. = emf and current falls to zero
3
Q
Define Capacitance
A
The charge stored per unit potential difference
4
Q
What is the equation for Capacitance?
A
C = Q/V
C = Capacitance / F
Q = Charge / C
V = Potential difference / V
5
Q
How do you calculate capacitance in parallel?
A
C = C1 + C2 + …
6
Q
How do you calculate capacitace in series?
A
1/C = 1/C1 + 1/C2 + …
7
Q
What is charge and pd like when capacitors are in parallel?
A
Q = Q1 + Q2 + …
Pd is the same
8
Q
What is charge and pd like in capacitors in series?
A
Q is the same
V = V1 + V2 + …
