Capacitors Flashcards
1
Q
What is a Capacitor?
A
An electrical device that stores charge.
2
Q
What is Capacitance?
A
Charge stored per unit potential difference between plates.
3
Q
Capacitor Equation
A
Q = VC
4
Q
What is Capacitance measured in?
A
Farad
5
Q
What is the equation for energy stored in a capacitor?
A
W = 1/2 Q V
6
Q
Exponential Growth / Decay Definition
A
When a quantity increases or decreases by the same proportion in each equal time interval.
7
Q
Time Constant Definition
A
The rate of charging or discharging a capacitor - resistor circuit.
8
Q
Time Constant Equation
A
t = RC
9
Q
Exponential Charging / Discharging Equations
A
Q = Q0e^-t/RC
V = V0e^-t/RC
I = I0e^-t/RC
