= Capacitor = A Capacitor is a component that stores energy in an electric field. It does this by having two plates seperated by a dielectric. This is called capactitance and is measured in farads (F). Capacitors are resistant to changes in voltage, and therefore can be used to smooth out sudden changes. They also cause AC signals voltage and current to get out of sync == Types == Different types of Caps are useful for different applications, simply based on the materials present in the cap. * Ceramics * Good for RF filtering at high frequencies * Plastic Film * circuits at audio and lower frequencies * Silvered-Mica * Highly stable, low loss, used in RF circuits * Electolytic and tantalum * Power supply filter circuits * Air and vacuum dieletric * transmitters and RF circuits