Capacitor

Capacitor:

A capacitor is a passive electronic component consisting of a pair of conductors separated by a dielectric. When a voltage potential difference exists between the conductors, an electric field is present in the dielectric. This field stores energy and produces a mechanical force between the plates. The effect is greatest between wide, flat, parallel, narrowly separated conductors.

Dielectric:

A basic capacitor is made up of two conductors separated by an insulator, or dielectric. The dielectric can be made of paper, plastic, mica, ceramic, glass, a vacuum or nearly any other non conductive material. Some capacitors are called electrolytic, meaning that their dielectric is made up of a thin layer of oxide formed on an aluminum or tantalum foil conductor.

Cautions:

Capacitors may retain charge long after power is removed from a circuit; this ascribe can origin unsafe or even potentially mortal alarms or damage attached gear. For example, even an apparently innocuous apparatus such as a disposable camera flash unit driven by a 1.5 volt AA electric battery contains a capacitor which may be ascribed to over 300 volts. This is effortlessly adept of delivering a shock.

Value of Unknown Capacitance

Capacitance:

In electromagnetism and electronics, capacitance is the ability of a body to hold an electrical charge. Capacitance is also a measure of the amount of electric charge stored (or separated) for a given electric potential. The SI unit of capacitance is the farad; 1 farad = 1 coulomb per volt.

Construction:

Working:

In order to note the value of an unknown capacitance we have a capacitor box and we one by one press the buttons on it and in the end we calculate the final capacitance. Then we find the unknown capacitor’s value by working on the other three values.