Capacitors (which was originally called the condenser) in the structure principally consists of two conductor plate opposite charge, each having a surface area A, and has a broad unity σ charge. Conductors separated by a dielectric substance which is an insulator by a distance d. These substances will trap the free electrons. The charge is on the surface of the conductor that the sum total is zero.
This is due to the negative and positive jumlahmuatan equally great. Dielectric material is a material yangjika there is no electric field is an insulator, but if there is medanlistrik the past, it will form electric dipoles, which is the direction of the magnetic field against the original electric field.
Figure 3.9 Parallel Plate Before Connect with voltage source
Figure 3.9 shows two parallel plates before it is connected to a voltage source. Prior to the charge on the plates, the dielectric material having random dipole that is an insulator. After a charged plate that produces medanl istricts to the right, the charge on the dielectric polarized by an electric field. The positive charge slowly towards the negative plate, and a negative charge to the positive plate. As a result there is a new electric field on the dielectric against the initial electric field cancel each other, so that the total electric field becomes zero, and the current stops flowing.
Figure 3.9 Parallel Plate after connected to Source Voltage
Forms and types of capacitors will vary, but in order to facilitate discussion we will focus on only one type of capacitor that is parallel-plate capacitor. From the aspect of insulation materials, types of capacitors of various types, for example made of ceramic capacitors, polyester, polystyrene, Teflon, tantalum, mica, and others.