Capacitance Flashcards
1
Q
What is the capacitance of a capacitor?
A
This is the charge stored on one plate per unit of potential difference between the plates.
2
Q
Equation for charge on a capacitor.
A
Q = VC
3
Q
Unit of capacitance?
A
Farad (F)
4
Q
Potential difference
A
The energy lost per unit charge by charges passing through a component.
5
Q
The name of the insulating material between the leads?
A
Dielectric
6
Q
The equation for work done in moving charge through a constant p.d.
A
W = QV
7
Q
Equation for work done in charging a capacitor.
A
W = ½QV OR W = ½CV² OR W = ½Q² /C
8
Q
Equation for capacitors in parallel.
A
C = C₁ + C₂ …..
And also,
Q = Q₁ + Q₂……
9
Q
Equation for capacitor in series. ( constant Q)
A
1/C = 1/C₁+ 1/C₂….
And also
V = V₁ + V₂…..
10
Q
Capacitance of a spherical object.
A
C = 4πε₀r.
