Capacitance Flashcards
Learn all about capacitance
What are the types of capacitors
Paper Capacitor Ceramic Capacitor Mica Capacitor Plastic Capacitor Parallel Plate Capacitor Electrolytic Capacitor
What is a dielectric
An insulating material which is used to fill the space between the plates in a capacitor which helps to increase the charge stored in the capacitor
What is a capacitor
A device used to store electrical charge and electric energy
The electrical conductors in a capacitor are also known as
Plates or electrodes
Plates and electrodes are
Always separated by a distance
The space between plates may be
A vacuum or filled with an insulating material also known as a dielectric
The symbol of electrolytic capacitors carries
A positive or negative sign to differentiate the electrodes
What is capacitance
The charge Q required to cause a unit change in voltage V
Capacitance can also be defined
As the maximum charge Q that can be stored in a capacitor to the applied voltage, V across the plates
Capacitance=
C=Q/V
The unit of capacitance is
Farad, F
Other metric prefix units:
Microfarad=
μF=10^-6F
Other prefix units:
Picofarad=
10^-12
Dielectrics in capacitors
Waxed paper- Paper
Polystyrene- Plastic
Mica- Mica
Tale with Barium Titanate added- Ceramic
Different types of dielectrics can be used- Parallel plate
A film of Aluminum Oxide (Al2O3)- Electrolytic
Air- Variable
Variable capacitors are used to
Tune radio and TV receivers
