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Capacitors are, in principal, two parallel plates separated by something (the dielectric). This dielectric can be many things, in fact most non-conductive things, air is just one.
Warning, heavy science (way way above my level)
http://en.wikipedia.org/wiki/Dielectric#Some_practical_dielectrics
Photo of variable air dielectric capacitor, used to be used to tune radios for example. You can see the plates and air gap.
http://en.wikipedia.org/wiki/File:Variable_Capacitor.jpg
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What else can I help you with?
How do capacitors classified?
capacitors are classified on the basis of dielectric material used inside it. For example the electrolytic capacitor consist electrolyte as dielectric mica capacitor consist mica as dielectric between plates and ceramic capacitor consist ceramic as dielectric.
What happens to charge and potential difference and capacitance in the presence of dielectric when the battery is disconnected from the capacitors?
The capacitor will hold the charge, until it leaks off due to resistances in the dielectric or external.
How does electrolytic capacitors work?
In an electrolytic capacitor the dielectric is a thin corrosion layer formed on the surface of a metal plate, the other plate of the capacitor is a moist electrolyte paste. This very thin dielectric allows electrolytic capacitors to have very high values of capacitance in small packages, but has two disadvantages: low breakdown voltage & polarization of the capacitor. It is very important that the polarity of an electrolytic capacitor not be reversed. If the polarity is reversed the thin corrosion layer erodes until the capacitor has no dielectric and shorts out, allowing electrolyses to produce hydrogen and oxygen gas in the moist electrolyte paste. The gas pressure eventually rises to the point that the case ruptures and the capacitor explodes.
What is ceramics in electronics?
It refers to one type of dielectric capacitor. Several solid dielectrics are available, including paper, plastic, glass, mica and ceramic materials.
How DC behave with Capacitor?
Capacitor contains a dielectric sandwitched between two plates. So, it act as a charge storage device. When dc supply is given,it gets charged to its maximum capacity or potential equal to the supply, and then it act as a open circuit, since it has no way to discharge.
An air capacitor is a?
And air capacitor is usually a motion capacitor whereby plates mesh to form a different capacitance using air as dielectric
What is the material use in the capacitor?
Capacitors are named after their dielectrics. So, an 'air capacitor' uses air as its dielectric, a 'mica capacitor' uses mica as its dielectric, and so on. There are lots of different dielectric used to separate the plates of a capacitor, each with different permittivities and dielectric strengths. As the perfect dielectric (i.e. one with both a very high permittivity and a very high dielectric strength) doesn't occur, the choice of dielectric is always a compromise between it permittivity and dielectric strength.
What separates terminals inside a capacitor?
Any dielectric material can be used to separate the two metal plates inside a capacitor. This includes polymer, paper, glass or even air (although air is seldom used now).
What is the effect of inserting a dielectric other than air vacuum between the plates of a capacitor?
Inserting a dielectric other than air or vacuum between the plates of a capacitor increases the capacitance of the capacitor. The dielectric material increases the electric field strength within the capacitor, which enhances its ability to store charge. This results in a higher capacitance value compared to having air or vacuum between the plates.
How do capacitors classified?
capacitors are classified on the basis of dielectric material used inside it. For example the electrolytic capacitor consist electrolyte as dielectric mica capacitor consist mica as dielectric between plates and ceramic capacitor consist ceramic as dielectric.
What is the effect of inserting a dielectric other than air or vacuum between the plates of a capacitors?
Inserting a dielectric material between the plates of a capacitor increases the capacitance of the capacitor. The dielectric reduces the electric field between the plates and allows for more charge to be stored. This results in an increase in the amount of electric potential energy that can be stored in the capacitor.
An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up Now a slab of dielectric material is placed between the plates of the capacitor while the capacitor is still?
the charge on the capacitor had increased.
If you take out the battery in a capacitor before inserting a dielectric will there still be charge on the dielectric?
The charge in a capacitor is between the plates. The dielectric is only an insulator that allows the plates to be very close without touching and discharging the charge. There is no battery in a capacitor.
What is the effect of inserting a dielectric other than air on vacuum between the plates of a capacitor?
Capacitance definitely increases
How does the insertion of a dielectric affect the capacitance of a capacitor?
When a dielectric is inserted between the plates of a capacitor, it increases the capacitance of the capacitor. This is because the dielectric material reduces the electric field between the plates, allowing more charge to be stored on the plates for a given voltage.
Which is the capacitor with lowest leakage?
tantalum dielectric
What type of capacitor uses aluminum as its dielectric?
Electrolytic capacitors use aluminium as a dielectric.
