Capacitor and capacitance

A Capacitor or a Condenser is a device for storing charge. A combination of two conductor plates of area A, put closed to each other separated by a small distance d is called a capacitor.

Add caption

These plates could be of any shape -a sphere ,cylinder or flat plate. The geometry of the capacitor plates determines the capacitance for a given plate conductor area. Usually the space between the plates is filled with a dielectric medium of relative permittivity ℰ.

The earliest capacitor was invented accidentally by Van MUSSCHENBROEK of Leden in about 1746 and became known as a Leden Jar.

Technically any conducting material has some resistance,capacitance and inductance . If we put some charge on a piece of aluminium foil it will retain it until someone touches it or somehow it makes contact with a nearby substance,however its charge storing capacity is very limited since excessive charge density will lead to Corona Discharge.

A marvelous example of such capacitor is Van De Graff Generator which consist of a hollow sphere which stores charge ,the second plate of which can be considered at infinity.

To read complete article . Visit our website . Brothersclasses.in capacitor

Or visit our home page for fresh articles.

Brothersclasses

Comments

A Comprehensive Beginner's Guide to Photography

Photography is an art of creating images with the help of Camera. It works on the principals of science. When light from an object hits a photo sensitive surface through a narrow hole it creates a visually identical image, which is nothing but a set of 'pieces of photo information' of the subject.It is divided into millions of pixels .A Pixel can be understood as a tiny point in the subject that is clearly visible or distinguished by the Photo lens. T his article will help you understand the basics of photography. It will also teach you how to capture good shots with your Camera or Smartphone. Go through step by step learning and at the end you will have a through understanding of these terms. Photography,How does it work Understanding Camera Exposure Triangle Metering Macro photography How good is photography with smartphones. Antibanding, How does it affect our photographs. So, without delaying let us begin our Guide from basics. Photographic work can be ...

Image file Formats and Their applications :JPEG,TIFF,GIF,BMP, AND PNG

Image file formats are standardized means to store Digital image data which can be either in Raster or Vector format .Once rasterized they become a gid of pixels There are several image file formats that can store images either with lossy or lossless compression methods. Each having their advantages and disadvantages .Though no. of Image storing file formats is not very limited. Some native applications use their own file formats for storing image data such as photoshop (.psd),corel draw(.CDR) that have been created to provide some additional features over conventional file formats. Recognizing file format File formats predicts much about file Data. It helps us in listing/sorting of the files which can be opened with a particular kind of application. File format can be simply found at the last of a file name begins with a (.) dot. While some applications may hide this information from the file name to prevent accidental renaming of the file extension/ format, which might ...

Choosing the right Battery : A detailed article on various batteries and their applications

Power in terms of science usually referred as the energy for work, everything in this high-tech world requires energy to operate .This energy can be either physical , chemical or mechanical. Digital electronic devices takes electrical energy as input .Say, It is your favourite smartphone , watch or electric car they all require electrical energy for proper functioning. source: hardwarezone.com.sg This energy can be obtained from batteries , solar panel or Home electric supply. Electrical energy supply can be categorized into AC(alternative Current) and DC(direct current).They have different applications in our daily life. Why is this the matter of talk? Today we are surrounded by electronic gadgets . It could be your laptop ,smartphone or something else . All these products are powered by some kind of electrical energy. To provide stability and mobility these products are lashed with high tech advance batteries .

Search This Blog