Principle of Parallel Plate Capacitor | Capacitor | Generate Concept

The principle of Parallel Plate Capacitor

The capacitance of a charged conductor is increased by bringing another uncharged or low potential conductor near it. when some non-conducting medium is kept between them 

The principle of Parallel Plate Capacitor

Considers a positvely charged conducting plate A of small thickness in the air. Bring another uncharged conducting thin plate B Closer  to plate Aa such that negative charge is induced on the nearer face of plate B and equal positive charge on the further face of plate B.

Parallel Plate Capacitor

The induced negative charge  on plate B trends to  decrease the potential of plate A because -ve charge on the B tries to cancel the effect of +ve charge on A, while the induced positive charge on plate B trends to increase the potential of plate A. Since induced negative charge on B is closer to plateA than the induced positive charge, so there will be net decrease in  the potential of A. In order to make the potential of the plate A same, more charge can be given  to it. It clear the capacity of plate A has inncreased by bringing a conducting plate  B closer to it.

Principle of Parallel Plate Capacitor

 If plate B in now connected to the earth induced positive  charged will be  neutalized by the electrons coming from the earth. Potential of plate A is further decreasd  as now there is only induced negative charge on plate B. In the order to make the  potential of  the plate A same, more charge can be given to it. Thus,  good  deal of charge can be stored in the above arrangement.
A system so formed is called a parallel plate capacitor. Thus to store, a  required between the conducting plates seprated by some non-conductting medium.