Capacitor

CAPACITOR
Capacitor is an electronic device, which is used to store electric charge or electrical energy. A capacitor     stores electric charge on its plates. There are a number of types of capacitors available.
STRUCTURE OF CAPACITOR
A capacitor consists of two identical conducting plates which are placed in front of each other. One          plate of capacitor is connected to the positive terminal of power supply and the other plate is connected     to negative terminal. The plate, which is connected to positive terminal acquired positive charge, and the     other plate connected to negative terminal. Separation between the plates in very small. The space     between the plates is field with air or any suitable dielectric material
A parallel plate capacitor
PRINCIPLE OF CAPACITOR
Electric charge stored between the plates of a capacitor is directly proportional to the potential     difference between the plates.
Let the potential difference between the plates is V and the charge stored on any one of the plates of     capacitor is Q then,
Q a V Q = CV
where     C= Capacitance of the capacitor
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CAPACITANCE
Charge storing capability of a capacitor is called capacitance of capacitor.     Definition: Capacitance of a capacitor is defined as the ratio of the charge stored on any of the plates of     capacitor to the potential between the plates.
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