A capacitor is a device that stores electric charge between two conductive plates separated by an insulator. It consists of two parallel plates with a non-conductive material, such as glass or air, in between. Capacitance is the ability of a capacitor to store charge, and it is directly proportional to the charge stored and inversely proportional to the voltage. Capacitors come in different shapes and sizes and are used in a variety of electronic applications such as audio systems, sensing devices, and separating alternating and direct current.

1. TOPIC-4CAPACITOR

2. CONTENT
• INTRODUCTION
• TYPES
• CAPACITANCE
• BASIC CONSTRUCTION
• STORING CHARGE
• CAPAITOR IN PARALLEL AND SERIES
• USES

3. WHAT IS CAPACITOR
• Device that store electric charges.
• Consists of two plates.
• Separated by an insulator.
• Non- conductive region can either be a
vacuum or electrical insulator known as
dielectric. (glass, air, paper, semi-conductor)
• Variety of sizes and shapes.
• Symbol

4. Types of Capacitor
• Parallel Plate Capacitor
• Cylindrical Capacitor

5. Capacitance
• Ability to store charge.
• Unint of capacitance is Farad (F)
• Capacitance values are normally smaller such as
micro Farad, nano Farad, pico Farad.
• C=Q/V
• Capacitance of capacitor is directly proportional
to charger store on that capacitor and inversely
proportional to voltage.

6. Basic capacitor construction
• Two plates.
• Dielectric (air, glass, paper or Dielectric semi-
conductor material).
• Due to dielectric charges store on capacitor
plates.

7. Storing Charge On Capacitor
• Connect to a voltage source.
• Positive charges start flowing one plate of
capacitor and negative towards other.
• Due to dielectric charges start accumulating on
plate surface .
• Potential rises from zero.
• Flow of charges stop when capacitor potential
become equal to potential of battery.
• Same case with negative charges.
• So, charges store on the capacitor.

8. Uses of Capacitor
• Used as Batteries.
• Used as sensing devices
• Used to separate AC and DC
• Used in Vehicle audio system