Flashcards in Capacitors Deck (11)
What are the two types of capacitor?
Ceramic and electrolytic
What is the main difference between putting an electrolytic and ceramic capacitor in a circuit?
An electrolytic capacitor is polarised
What are capacitors used for?
To store charge
What does the rate of discharge of a capacitor depend on?
-The size of the capacitance
-The resistance in the circuits
How is capacitance calculated?
C = Q/V
What is the unit of capacitance?
Give three examples of how capacitors are used.
- Smoothing power supplies
- Time delay circuits
What pattern does the discharge of a capacitor follow?
How is the charge of a discharging capacitor calculated?
Q = Q0e^(-t/CR)
How is the half life of a capacitor calculated?
t = CRln2